Adam Strzelecki to SDL

When using deployment in Xcode we use 10.4 SDK for PPC & i386 and 10.6 SDK for x86_64 unfortunately MAC_OS_X_VERSION_10_6 is defined only in 10.6 SDK, in older SDKs it is undefined which makes >= comparison return always TRUTH, so the GCC complains about undefined <NSWindowDelegate>, even if the original intention was to omit <NSWindowDelegate> on older SDKs.

Solution, don't relay on MAC_OS_X_VERSION_10_6 but use OSX revision number 1060 directly as SDL does in many other places.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404137

src/video/cocoa/SDL_cocoawindow.h

@@ -29,7 +29,7 @@
 typedef struct SDL_WindowData SDL_WindowData;
 
 /* *INDENT-OFF* */
-#if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_6
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
 @interface Cocoa_WindowListener : NSResponder <NSWindowDelegate> {
 #else
 @interface Cocoa_WindowListener : NSResponder {