Make me.DefaultLoadingScreen idempotent.
Make me.DefaultLoadingScreen idempotent.

- Using the loading screen more than once would cause an exception, since the font gets destroyed when loading completes the first time.

TukekeSoft/melonJS,TukekeSoft/melonJS,gopalindians/melonJS,srbala/melonJS,srbala/melonJS,melonjs/melonJS,melonjs/melonJS,rlugojr/melonJS,MarkoIvanetic/melonJS,TukekeSoft/melonJS,Smoss/Enoru-eco,gopalindians/melonJS,srbala/melonJS,Smoss/Enoru-eco,MarkoIvanetic/melonJS,rlugojr/melonJS,gopalindians/melonJS,rlugojr/melonJS