avcodec/h264_cabac: Tighten allowed coeff_abs range
Fixes: integer overflows Reported-by: "Xiaohan Wang (王消寒)" <xhwang@chromium.org> Based on limits in "8.5 Transform coefficient decoding process and picture construction process prior to deblocking filter process" Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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