Fixed a bug where the scrim could flash black when snoozing huns

Because of an underflow the alpha could actually become 0xff instead
off 0 which would be visible as a black scrim. This was because of
our local updating of animators.

Change-Id: I4201a4bbfbc7cbf32819f4814c165d0e11adaadb
Fixes: 28840532
1 file changed