Mac: Make sure window is still showing when we exit a fullscreen space.

--HG--
extra : histedit_source : 59238ebf154158241e31d46137ff70fd81f20d94

src/video/cocoa/SDL_cocoawindow.m

@@ -612,6 +612,8 @@ SetWindowStyle(SDL_Window * window, unsigned int style)
         window->w = 0;
         window->h = 0;
         [self windowDidResize:aNotification];
+
+        Cocoa_ShowWindow(SDL_GetVideoDevice(), window);
     }
 }