Fixed warnings and UB in demo code

demo/glfw_opengl2/nuklear_glfw_gl2.h

@@ -223,7 +223,7 @@ nk_glfw3_mouse_button_callback(GLFWwindow* window, int button, int action, int m
         double dt = glfwGetTime() - glfw.last_button_click;
         if (dt > NK_GLFW_DOUBLE_CLICK_LO && dt < NK_GLFW_DOUBLE_CLICK_HI) {
             glfw.is_double_click_down = nk_true;
-            glfw.double_click_pos = nk_vec2(x, y);
+            glfw.double_click_pos = nk_vec2((float)x, (float)y);
         }
         glfw.last_button_click = glfwGetTime();
     } else glfw.is_double_click_down = nk_false;
@@ -352,7 +352,7 @@ nk_glfw3_new_frame(void)
     glfwGetCursorPos(win, &x, &y);
     nk_input_motion(ctx, (int)x, (int)y);
     if (ctx->input.mouse.grabbed) {
-        glfwSetCursorPos(glfw.win, ctx->input.mouse.prev.x, ctx->input.mouse.prev.y);
+        glfwSetCursorPos(glfw.win, (double)ctx->input.mouse.prev.x, (double)ctx->input.mouse.prev.y);
         ctx->input.mouse.pos.x = ctx->input.mouse.prev.x;
         ctx->input.mouse.pos.y = ctx->input.mouse.prev.y;
     }
@@ -360,7 +360,7 @@ nk_glfw3_new_frame(void)
     nk_input_button(ctx, NK_BUTTON_LEFT, (int)x, (int)y, glfwGetMouseButton(win, GLFW_MOUSE_BUTTON_LEFT) == GLFW_PRESS);
     nk_input_button(ctx, NK_BUTTON_MIDDLE, (int)x, (int)y, glfwGetMouseButton(win, GLFW_MOUSE_BUTTON_MIDDLE) == GLFW_PRESS);
     nk_input_button(ctx, NK_BUTTON_RIGHT, (int)x, (int)y, glfwGetMouseButton(win, GLFW_MOUSE_BUTTON_RIGHT) == GLFW_PRESS);
-    nk_input_button(ctx, NK_BUTTON_DOUBLE, glfw.double_click_pos.x, glfw.double_click_pos.y, glfw.is_double_click_down);
+    nk_input_button(ctx, NK_BUTTON_DOUBLE, (int)glfw.double_click_pos.x, (int)glfw.double_click_pos.y, glfw.is_double_click_down);
     nk_input_scroll(ctx, glfw.scroll);
     nk_input_end(&glfw.ctx);
     glfw.text_len = 0;

demo/glfw_opengl3/nuklear_glfw_gl3.h

@@ -332,7 +332,7 @@ nk_glfw3_mouse_button_callback(GLFWwindow* window, int button, int action, int m
         double dt = glfwGetTime() - glfw.last_button_click;
         if (dt > NK_GLFW_DOUBLE_CLICK_LO && dt < NK_GLFW_DOUBLE_CLICK_HI) {
             glfw.is_double_click_down = nk_true;
-            glfw.double_click_pos = nk_vec2(x, y);
+            glfw.double_click_pos = nk_vec2((float)x, (float)y);
         }
         glfw.last_button_click = glfwGetTime();
     } else glfw.is_double_click_down = nk_false;
@@ -418,7 +418,7 @@ nk_glfw3_new_frame(void)
     for (i = 0; i < glfw.text_len; ++i)
         nk_input_unicode(ctx, glfw.text[i]);
 
-#if NK_GLFW_GL3_MOUSE_GRABBING
+#ifdef NK_GLFW_GL3_MOUSE_GRABBING
     /* optional grabbing behavior */
     if (ctx->input.mouse.grab)
         glfwSetInputMode(glfw.win, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
@@ -463,7 +463,7 @@ nk_glfw3_new_frame(void)
 
     glfwGetCursorPos(win, &x, &y);
     nk_input_motion(ctx, (int)x, (int)y);
-#if NK_GLFW_GL3_MOUSE_GRABBING
+#ifdef NK_GLFW_GL3_MOUSE_GRABBING
     if (ctx->input.mouse.grabbed) {
         glfwSetCursorPos(glfw.win, ctx->input.mouse.prev.x, ctx->input.mouse.prev.y);
         ctx->input.mouse.pos.x = ctx->input.mouse.prev.x;
@@ -473,7 +473,7 @@ nk_glfw3_new_frame(void)
     nk_input_button(ctx, NK_BUTTON_LEFT, (int)x, (int)y, glfwGetMouseButton(win, GLFW_MOUSE_BUTTON_LEFT) == GLFW_PRESS);
     nk_input_button(ctx, NK_BUTTON_MIDDLE, (int)x, (int)y, glfwGetMouseButton(win, GLFW_MOUSE_BUTTON_MIDDLE) == GLFW_PRESS);
     nk_input_button(ctx, NK_BUTTON_RIGHT, (int)x, (int)y, glfwGetMouseButton(win, GLFW_MOUSE_BUTTON_RIGHT) == GLFW_PRESS);
-    nk_input_button(ctx, NK_BUTTON_DOUBLE, glfw.double_click_pos.x, glfw.double_click_pos.y, glfw.is_double_click_down);
+    nk_input_button(ctx, NK_BUTTON_DOUBLE, (int)glfw.double_click_pos.x, (int)glfw.double_click_pos.y, glfw.is_double_click_down);
     nk_input_scroll(ctx, glfw.scroll);
     nk_input_end(&glfw.ctx);
     glfw.text_len = 0;

demo/sdl_opengl3/nuklear_sdl_gl3.h

@@ -221,6 +221,7 @@ nk_sdl_render(enum nk_anti_aliasing AA, int max_vertex_buffer, int max_element_b
         const struct nk_draw_command *cmd;
         void *vertices, *elements;
         const nk_draw_index *offset = NULL;
+        struct nk_buffer vbuf, ebuf;
 
         /* allocate vertex and element buffer */
         glBindVertexArray(dev->vao);
@@ -255,10 +256,9 @@ nk_sdl_render(enum nk_anti_aliasing AA, int max_vertex_buffer, int max_element_b
             config.line_AA = AA;
 
             /* setup buffers to load vertices and elements */
-            {struct nk_buffer vbuf, ebuf;
             nk_buffer_init_fixed(&vbuf, vertices, (nk_size)max_vertex_buffer);
             nk_buffer_init_fixed(&ebuf, elements, (nk_size)max_element_buffer);
-            nk_convert(&sdl.ctx, &dev->cmds, &vbuf, &ebuf, &config);}
+            nk_convert(&sdl.ctx, &dev->cmds, &vbuf, &ebuf, &config);
         }
         glUnmapBuffer(GL_ARRAY_BUFFER);
         glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);

demo/x11_opengl3/nuklear_xlib_gl3.h

@@ -510,6 +510,7 @@ nk_x11_render(enum nk_anti_aliasing AA, int max_vertex_buffer, int max_element_b
         const struct nk_draw_command *cmd;
         void *vertices, *elements;
         const nk_draw_index *offset = NULL;
+        struct nk_buffer vbuf, ebuf;
 
         /* allocate vertex and element buffer */
         glBindVertexArray(dev->vao);
@@ -544,10 +545,9 @@ nk_x11_render(enum nk_anti_aliasing AA, int max_vertex_buffer, int max_element_b
             config.line_AA = AA;
 
             /* setup buffers to load vertices and elements */
-            {struct nk_buffer vbuf, ebuf;
             nk_buffer_init_fixed(&vbuf, vertices, (size_t)max_vertex_buffer);
             nk_buffer_init_fixed(&ebuf, elements, (size_t)max_element_buffer);
-            nk_convert(&x11.ctx, &dev->cmds, &vbuf, &ebuf, &config);}
+            nk_convert(&x11.ctx, &dev->cmds, &vbuf, &ebuf, &config);
         }
         glUnmapBuffer(GL_ARRAY_BUFFER);
         glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);

nuklear.h

@@ -8616,22 +8616,23 @@ nk_draw_list_path_arc_to(struct nk_draw_list *list, struct nk_vec2 center,
 
         [1] https://en.wikipedia.org/wiki/List_of_trigonometric_identities#Angle_sum_and_difference_identities
     */
-    const float d_angle = (a_max - a_min) / (float)segments;
+    {const float d_angle = (a_max - a_min) / (float)segments;
     const float sin_d = (float)NK_SIN(d_angle);
     const float cos_d = (float)NK_COS(d_angle);
 
     float cx = (float)NK_COS(a_min) * radius;
     float cy = (float)NK_SIN(a_min) * radius;
     for(i = 0; i <= segments; ++i) {
+        float new_cx, new_cy;
         const float x = center.x + cx;
         const float y = center.y + cy;
         nk_draw_list_path_line_to(list, nk_vec2(x, y));
 
-        const float new_cx = cx * cos_d - cy * sin_d;
-        const float new_cy = cy * cos_d + cx * sin_d;
+        new_cx = cx * cos_d - cy * sin_d;
+        new_cy = cy * cos_d + cx * sin_d;
         cx = new_cx;
         cy = new_cy;
-    }
+    }}
 }
 
 NK_API void
@@ -21342,7 +21343,7 @@ nk_edit_buffer(struct nk_context *ctx, nk_flags flags,
         }
         if (flags & NK_EDIT_CLIPBOARD)
             edit->clip = ctx->clip;
-        edit->active = win->edit.active;
+        edit->active = (unsigned char)win->edit.active;
     } else edit->active = nk_false;
     edit->mode = win->edit.mode;