REVIEWED: Narrowing issue for g++ #179

It requires review for MSVC

src/raygui.h

@@ -1401,7 +1401,7 @@ void GuiGroupBox(Rectangle bounds, const char *text)
     GuiDrawRectangle(RAYGUI_CLITERAL(Rectangle){ bounds.x, bounds.y + bounds.height - 1, bounds.width, RAYGUI_GROUPBOX_LINE_THICK }, 0, BLANK, Fade(GetColor(GuiGetStyle(DEFAULT, (state == STATE_DISABLED)? BORDER_COLOR_DISABLED : LINE_COLOR)), guiAlpha));
     GuiDrawRectangle(RAYGUI_CLITERAL(Rectangle){ bounds.x + bounds.width - 1, bounds.y, RAYGUI_GROUPBOX_LINE_THICK, bounds.height }, 0, BLANK, Fade(GetColor(GuiGetStyle(DEFAULT, (state == STATE_DISABLED)? BORDER_COLOR_DISABLED : LINE_COLOR)), guiAlpha));
 
-    GuiLine(RAYGUI_CLITERAL(Rectangle){ bounds.x, bounds.y - GuiGetStyle(DEFAULT, TEXT_SIZE)/2, bounds.width, GuiGetStyle(DEFAULT, TEXT_SIZE) }, text);
+    GuiLine(RAYGUI_CLITERAL(Rectangle){ bounds.x, bounds.y - GuiGetStyle(DEFAULT, TEXT_SIZE)/2, bounds.width, (float)GuiGetStyle(DEFAULT, TEXT_SIZE) }, text);
     //--------------------------------------------------------------------
 }