Wayland: Don’t update cursor position in the frame

That way the application only sees the cursor moving when it is inside
of its area, it won’t go back to the top or left side when trying to
resize the window or just hovering the fallback decorations.

(cherry picked from commit a80788c17f3376177b45d52f983d4d98f1175af2)

src/wl_init.c

@@ -180,47 +180,45 @@ static void pointerHandleMotion(void* data,
 {
     _GLFWwindow* window = _glfw.wl.pointerFocus;
     const char* cursorName = NULL;
+    double x, y;
 
     if (!window)
         return;
 
     if (window->cursorMode == GLFW_CURSOR_DISABLED)
         return;
-    else
-    {
-        window->wl.cursorPosX = wl_fixed_to_double(sx);
-        window->wl.cursorPosY = wl_fixed_to_double(sy);
-    }
+    x = wl_fixed_to_double(sx);
+    y = wl_fixed_to_double(sy);
 
     switch (window->wl.decorations.focus)
     {
         case mainWindow:
-            _glfwInputCursorPos(window,
-                                wl_fixed_to_double(sx),
-                                wl_fixed_to_double(sy));
+            window->wl.cursorPosX = x;
+            window->wl.cursorPosY = y;
+            _glfwInputCursorPos(window, x, y);
             return;
         case topDecoration:
-            if (window->wl.cursorPosY < _GLFW_DECORATION_WIDTH)
+            if (y < _GLFW_DECORATION_WIDTH)
                 cursorName = "n-resize";
             else
                 cursorName = "left_ptr";
             break;
         case leftDecoration:
-            if (window->wl.cursorPosY < _GLFW_DECORATION_WIDTH)
+            if (y < _GLFW_DECORATION_WIDTH)
                 cursorName = "nw-resize";
             else
                 cursorName = "w-resize";
             break;
         case rightDecoration:
-            if (window->wl.cursorPosY < _GLFW_DECORATION_WIDTH)
+            if (y < _GLFW_DECORATION_WIDTH)
                 cursorName = "ne-resize";
             else
                 cursorName = "e-resize";
             break;
         case bottomDecoration:
-            if (window->wl.cursorPosX < _GLFW_DECORATION_WIDTH)
+            if (x < _GLFW_DECORATION_WIDTH)
                 cursorName = "sw-resize";
-            else if (window->wl.cursorPosX > window->wl.width + _GLFW_DECORATION_WIDTH)
+            else if (x > window->wl.width + _GLFW_DECORATION_WIDTH)
                 cursorName = "se-resize";
             else
                 cursorName = "s-resize";