report error if scene does not exist
report error if scene does not exist

maciekwie/Crafty,craftyjs/Crafty,craftyjs/Crafty,starwed/Crafty,mucaho/Crafty,mucaho/Crafty,starwed/Crafty,maciekwie/Crafty,starwed/Crafty,maciekwie/Crafty,craftyjs/Crafty,mucaho/Crafty