Fixed build on Mac OS X 10.4

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403837

src/video/cocoa/SDL_cocoakeyboard.m

@@ -28,6 +28,16 @@
 
 #include <Carbon/Carbon.h>
 
+#if MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_4
+#if __LP64__
+typedef long NSInteger;
+typedef unsigned long NSUInteger;
+#else
+typedef int NSInteger;
+typedef unsigned int NSUInteger;
+#endif
+#endif
+
 //#define DEBUG_IME NSLog
 #define DEBUG_IME