Android Infinite Gallery

Provided a small Bugfix for the Android Infinite Gallery Project.
http://code.google.com/p/infinite-gallery/

Patch 1:
http://code.google.com/p/infinite-gallery/issues/detail?id=1
Bug in startUsingVelocity

this.moveByVelocity((int) -velocityX);
mFlingRunnable.startUsingVelocity((int) -velocity);

velocity is used with a negative sign twice