[automerger] Fix OOB access in mpeg4/h263 decoder am: ef4ce15700 am: 9832a2a3f4 am: 144ba69187 am: 6fa588c7b6 am: 88c0c4897c
am: efd8f9e09a

Change-Id: Ifa62d98915c01f3605e73479126347ddb2fdb92d