winex11.drv: Use EqualRect() instead of memcmp() to compare RECTs.

dlls/winex11.drv/window.c

@@ -2243,7 +2243,7 @@ void CDECL X11DRV_WindowPosChanging( HWND hwnd, HWND insert_after, UINT swp_flag
     surface_rect = get_surface_rect( visible_rect );
     if (data->surface)
     {
-        if (!memcmp( &data->surface->rect, &surface_rect, sizeof(surface_rect) ))
+        if (EqualRect( &data->surface->rect, &surface_rect ))
         {
             /* existing surface is good enough */
             window_surface_add_ref( data->surface );
@@ -2311,7 +2311,7 @@ void CDECL X11DRV_WindowPosChanged( HWND hwnd, HWND insert_after, UINT swp_flags
             old_client_rect.right  - data->client_rect.right  == x_offset &&
             old_client_rect.top    - data->client_rect.top    == y_offset &&
             old_client_rect.bottom - data->client_rect.bottom == y_offset &&
-            !memcmp( &valid_rects[0], &data->client_rect, sizeof(RECT) ))
+            EqualRect( &valid_rects[0], &data->client_rect ))
         {
             /* if we have an X window the bits will be moved by the X server */
             if (!window && (x_offset != 0 || y_offset != 0))
@@ -2595,7 +2595,7 @@ BOOL CDECL X11DRV_UpdateLayeredWindow( HWND hwnd, const UPDATELAYEREDWINDOWINFO
     OffsetRect( &rect, -window_rect->left, -window_rect->top );
 
     surface = data->surface;
-    if (!surface || memcmp( &surface->rect, &rect, sizeof(RECT) ))
+    if (!surface || !EqualRect( &surface->rect, &rect ))
     {
         data->surface = create_surface( data->whole_window, &data->vis, &rect,
                                         color_key, !data->embedded );