Decoder: Fix in MB count in MBAff error handling

Number of MBs to be marked as skip should be even for MBAff
error streams

Bug: 33450635
Change-Id: I6af59632e4b2d2882881fe8c52472164ea088f7a
(cherry picked from commit 43e0aa221067341b0b32bc87410a1ca45d9a6455)
1 file changed