Fixed error when creating an instance of Tween without parameters (normaly used when used Tween::from() and Tween::to() methods). Also, no more need to use Tweeno::start() at tween creation
Fixed error when creating an instance of Tween without parameters (normaly used when used Tween::from() and Tween::to() methods). Also, no more need to use Tweeno::start() at tween creation

alv-c/Tweeno,alv-c/Tweeno