ui/cocoa: Don't use NSWindow useOptimizedDrawing on OSX 10.10 and up

Starting in OSX 10.10, NSWindow useOptimizedDrawing is deprecated, so
don't use it there.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Message-id: 1431296361-16981-6-git-send-email-peter.maydell@linaro.org

ui/cocoa.m

@@ -36,6 +36,9 @@
 #ifndef MAC_OS_X_VERSION_10_6
 #define MAC_OS_X_VERSION_10_6 1060
 #endif
+#ifndef MAC_OS_X_VERSION_10_10
+#define MAC_OS_X_VERSION_10_10 101000
+#endif
 
 
 //#define DEBUG
@@ -824,7 +827,9 @@ QemuCocoaView *cocoaView;
         [normalWindow setAcceptsMouseMovedEvents:YES];
         [normalWindow setTitle:[NSString stringWithFormat:@"QEMU"]];
         [normalWindow setContentView:cocoaView];
+#if (MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_10)
         [normalWindow useOptimizedDrawing:YES];
+#endif
         [normalWindow makeKeyAndOrderFront:self];
         [normalWindow center];
         stretch_video = false;