Martin Storsjö 014773b66b libavutil: Use an intermediate variable in AV_COPY*U ...

If AV_RN and AV_WN are macros with multiple individual reads and
writes, the previous version of the AV_COPYU macro would fail if
the reads and writes overlap.

This should not be any less efficient in any case, given a
sensibly optimizing compiler.

Signed-off-by: Martin Storsjö <martin@martin.st>

2016-07-31 22:50:55 +03:00

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