Merge commit '20c38c9c18b75e62f6c489d9b95bea88efdf3915'
* commit '20c38c9c18b75e62f6c489d9b95bea88efdf3915':
swscale: fix some undefined signed left shifts
Conflicts:
libswscale/swscale_unscaled.c
See: 7a32ab5ed0
Merged-by: Michael Niedermayer <michaelni@gmx.at>
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