testgui: fix deprecation warning

mac_support_cocoa.m:80:49: warning: 'NSAnyEventMask' is deprecated: first deprecated in macOS 10.12 [-Wdeprecated-declarations]
                NSEvent* event = [NSApp nextEventMatchingMask:NSAnyEventMask
                                                              ^~~~~~~~~~~~~~
                                                              NSEventMaskAny
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSEvent.h:158:26: note:
      'NSAnyEventMask' has been explicitly marked deprecated here
static const NSEventMask NSAnyEventMask                 NS_DEPRECATED_WITH_REPLACEMENT_MAC("NSEventMaskAny", 10_0, 10_12) = NSUIntegerMax;
                         ^

Author: z3ntu

testgui/mac_support_cocoa.m

@@ -8,6 +8,15 @@
 #include <fx.h>
 #import <Cocoa/Cocoa.h>
 
+#ifndef MAC_OS_X_VERSION_10_12
+#define MAC_OS_X_VERSION_10_12 101200
+#endif
+
+// macOS 10.12 deprecated NSAnyEventMask in favor of NSEventMaskAny
+#if MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_12
+#define NSEventMaskAny NSAnyEventMask
+#endif
+
 extern FXMainWindow *g_main_window;
 
 
@@ -77,7 +86,7 @@ - (void) handleQuitEvent:(NSAppleEventDescriptor*)event withReplyEvent:(NSAppleE
 
 	NSAutoreleasePool *pool = [NSAutoreleasePool new];
 	while (1) {
-		NSEvent* event = [NSApp nextEventMatchingMask:NSAnyEventMask
+		NSEvent* event = [NSApp nextEventMatchingMask:NSEventMaskAny
 		                        untilDate:nil
                                         inMode:NSDefaultRunLoopMode
                                         dequeue:YES];