quartz: fix build for <10.12

The style mask type was changed from NSUInteger to NSWindowStyleMask.
Use NSUInteger so it also works on older macOS.

https://bugzilla.gnome.org/show_bug.cgi?id=780019

diff --git a/gdk/quartz/gdkwindow-quartz.c b/gdk/quartz/gdkwindow-quartz.c
index aa1049655f25bff56c40b4f0b1cd74632f7cf307..d7b2f047471bc8dcd71cc3f0e9368ebea338ed49 100644 (file)
--- a/gdk/quartz/gdkwindow-quartz.c
+++ b/gdk/quartz/gdkwindow-quartz.c
@@ -2346,7 +2346,7 @@ gdk_quartz_window_set_functions (GdkWindow    *window,
 
   if (impl->toplevel)
     {
-      NSWindowStyleMask mask = [impl->toplevel styleMask];
+      NSUInteger mask = [impl->toplevel styleMask];
 
       if (min)
         mask = mask | NSMiniaturizableWindowMask;