Decoder: Fixed flag u1_top_bottom_decoded.

Fixed initialization of flag u1_top_bottom_decoded
in decoder context. This flag indicates if top
field and botton field is decoded.

Bug: 36993291
Test: avcdec --input poc.h264 --output /dev/null
Change-Id: I9f8a2620683abd8b15e4780d76d4849394710716
(cherry picked from commit 7703822731a3e5425390ba1d177d061a699c367d)
2 files changed