libavcodec/util: Fix timebase overflow check

It could accidentally divide by zero if num was zero.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
This commit is contained in:
Derek Buitenhuis 2016-01-27 21:12:04 +00:00
parent 09d5c28c3d
commit 265ed6732f