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matroskadec: fix NULL pointer dereference

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The problem was introduced in commit 1273bc6.

Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2016-10-16 21:47:00 +02:00
parent d3874b74f3
commit eb751f06db
1 changed files with 1 additions and 1 deletions
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libavformat/matroskadec.c
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@ -1759,7 +1759,7 @@ static int mkv_field_order(MatroskaDemuxContext *matroska, int64_t field_order)
/* workaround a bug in our Matroska muxer, introduced in version 57.36 alongside
* this function, and fixed in 57.52 */
if (sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, &micro) == 3)
if (matroska->muxingapp && sscanf(matroska->muxingapp, "Lavf%d.%d.%d", &major, &minor, &micro) == 3)
bttb = (major == 57 && minor >= 36 && minor <= 51 && micro >= 100);
switch (field_order) {