Fixes left mouse button events.

gameplay/src/Mouse.h

@@ -16,14 +16,14 @@ public:
      */
     enum MouseEvent
     {
-        MOUSE_PRESS_LEFT_BUTTON = 3,
-        MOUSE_RELEASE_LEFT_BUTTON = 4,
-        MOUSE_PRESS_MIDDLE_BUTTON = 5,
-        MOUSE_RELEASE_MIDDLE_BUTTON = 6,
-        MOUSE_PRESS_RIGHT_BUTTON = 7,
-        MOUSE_RELEASE_RIGHT_BUTTON = 8,
-        MOUSE_MOVE = 9,
-        MOUSE_WHEEL = 10
+        MOUSE_PRESS_LEFT_BUTTON,
+        MOUSE_RELEASE_LEFT_BUTTON, 
+        MOUSE_PRESS_MIDDLE_BUTTON = 3,
+        MOUSE_RELEASE_MIDDLE_BUTTON = 4,
+        MOUSE_PRESS_RIGHT_BUTTON = 5,
+        MOUSE_RELEASE_RIGHT_BUTTON = 6,
+        MOUSE_MOVE = 7,
+        MOUSE_WHEEL = 8
     };