Windowing: Ignore suggested window sizes for windows that should not be DPI aware

modules/juce_gui_basics/native/juce_win32_Windowing.cpp

@@ -3370,6 +3370,12 @@ private:
 
     LRESULT handleDPIChanging (int newDPI, RECT newRect)
     {
+        // Sometimes, windows that should not be automatically scaled (secondary windows in plugins)
+        // are sent WM_DPICHANGED. The size suggested by the OS is incorrect for our unscaled
+        // window, so we should ignore it.
+        if (! isPerMonitorDPIAwareWindow (hwnd))
+            return 0;
+
         const auto newScale = (double) newDPI / USER_DEFAULT_SCREEN_DPI;
 
         if (approximatelyEqual (scaleFactor, newScale))