Fixing Scene.clearRecycledAll bug.

I was getting the following error in the current dev branch of HaxePunk:

/home/ben/Dev/my-HaxePunk/com/haxepunk/Scene.hx:330: characters 0-13 : Constraint check failure for clearRecycled.E
/home/ben/Dev/my-HaxePunk/com/haxepunk/Scene.hx:330: characters 0-13 : Could not resolve full type for constraint checks
/home/ben/Dev/my-HaxePunk/com/haxepunk/Scene.hx:330: characters 0-13 : Type was Unknown<0>

This small change fixed the problem.