fix leakage of global variable from forgotten "var"
fix leakage of global variable from forgotten "var"

fix leakage of global variable from forgotten "var" (revealed by QUnit)

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