Wayland: Fix duplicate window content scale events

The window content scale event was emitted every time the window content
area was resized, even if its scale had not changed.

README.md

@@ -340,6 +340,8 @@ information on what to include when reporting a bug.
  - [Wayland] Bugfix: Window maximization events were not emitted
  - [Wayland] Bugfix: `glfwRestoreWindow` assumed it was always in windowed mode
  - [Wayland] Bugfix: `glfwSetWindowSize` would resize a full screen window
+ - [Wayland] Bugfix: A window content scale event would be emitted every time
+   the window resized
  - [POSIX] Removed use of deprecated function `gettimeofday`
  - [POSIX] Bugfix: `CLOCK_MONOTONIC` was not correctly tested for or enabled
  - [WGL] Disabled the DWM swap interval hack for Windows 8 and later (#1072)

src/wl_window.c

@@ -315,7 +315,6 @@ static void resizeWindow(_GLFWwindow* window)
     if (!window->wl.transparent)
         setOpaqueRegion(window);
     _glfwInputFramebufferSize(window, scaledWidth, scaledHeight);
-    _glfwInputWindowContentScale(window, scale, scale);
 
     if (!window->wl.decorations.top.surface)
         return;
@@ -362,6 +361,7 @@ static void checkScaleChange(_GLFWwindow* window)
     {
         window->wl.scale = maxScale;
         wl_surface_set_buffer_scale(window->wl.surface, maxScale);
+        _glfwInputWindowContentScale(window, maxScale, maxScale);
         resizeWindow(window);
     }
 }