Implemented CMD+Q shortcut

ChangeLog

  OpenRaider (0.1.2) xythobuz <xythobuz@xythobuz.de>
 
 	[ 20140101 ]
+	* Implemented CMD + Q shortcut on Mac to quit
 	* Added bool mFirstMouseEvent to SDLSystem used to ignore
 	  the first received mouse event, because its faulty, thanks
 	  to an SDL bug:

src/OpenRaider.cpp

 			toggleFullscreen();
 		}
 		break;
+
+#ifdef __APPLE__
+    // Handle CMD+Q to quit
+    case 'q':
+        if (mod & SYS_MOD_KEY_LMETA) {
+            shutdown(0);
+        }
+        break;
+#endif
 	}
 
 	////////////////////////////////////////////////////////////

src/SDLSystem.cpp

 				if (mkeys & KMOD_RALT)
 					mod |= SYS_MOD_KEY_RALT;
 
+                if (mkeys & KMOD_LMETA)
+					mod |= SYS_MOD_KEY_LMETA;
+
+				if (mkeys & KMOD_RMETA)
+					mod |= SYS_MOD_KEY_RMETA;
+
 				key = event.key.keysym.sym;
 				specialKey = false;
 

src/System.h

   SYS_MOD_KEY_LCTRL  = 4,
   SYS_MOD_KEY_RCTRL  = 8,
   SYS_MOD_KEY_LALT   = 16,
-  SYS_MOD_KEY_RALT   = 32
+  SYS_MOD_KEY_RALT   = 32,
+
+  SYS_MOD_KEY_LMETA = 64,
+  SYS_MOD_KEY_RMETA = 128,
 
 } sdl_sys_mod_key_t;