Changed _msaa variable to the correct type.

There is no reason for it to be a float, it should be boolean.

src/SDL/MyOpenGLView.h

@@ -184,7 +184,7 @@ extern int debug;
 
 	float				_gamma;
 	float				_fov;
-	float				_msaa;
+	BOOL				_msaa;
 
    // Full screen sizes
 	NSMutableArray		*screenSizes;