[#641] Fix exception in layer drawing when resizing
[#641] Fix exception in layer drawing when resizing

- Update the viewport bounds, silly!

rlugojr/melonJS,melonjs/melonJS,srbala/melonJS,MarkoIvanetic/melonJS,gopalindians/melonJS,TukekeSoft/melonJS,gopalindians/melonJS,melonjs/melonJS,gopalindians/melonJS,rlugojr/melonJS,TukekeSoft/melonJS,srbala/melonJS,MarkoIvanetic/melonJS,TukekeSoft/melonJS,rlugojr/melonJS,srbala/melonJS