ColorFade: Fix memory leak (2 of 2)

1 of 2: https://github.com/AOSPA/android_frameworks_base/commit/7d45eeb8b64418b5c85b649ac14caf3fdae0f460

original patch from
   https://code.google.com/p/android/issues/detail?id=79729#c177

i can not get the email to add proper authorship, but all credits belong
to this person

Change-Id: Ica9a4ae02cd3c8435f46dd9c3bfdb52317f9a7ef