Implemented OpenGL support on Mac OS X

The OpenGL renderer works without changes, yay! :)

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401982

src/video/cocoa/SDL_cocoawindow.h

@@ -26,6 +26,7 @@
 
 typedef struct SDL_WindowData SDL_WindowData;
 
+/* *INDENT-OFF* */
 @interface Cocoa_WindowListener:NSResponder {
     SDL_WindowData *_data;
 }
@@ -58,7 +59,10 @@ typedef struct SDL_WindowData SDL_WindowData;
 -(void) mouseExited:(NSEvent *) theEvent;
 -(void) keyDown:(NSEvent *) theEvent;
 -(void) keyUp:(NSEvent *) theEvent;
-@end struct SDL_WindowData
+@end
+/* *INDENT-ON* */
+
+struct SDL_WindowData
 {
     SDL_WindowID windowID;
     NSWindow *window;