[FFmpeg-cvslog] Return -1 on invalid input instead of crashing.

[Jean-Tiare Le Bigot]

ffmpeg | branch: master | Jean-Tiare Le Bigot <jtlebi at gmail> | Wed May 25 20:12:17 2011 +0200| [364889cf9c1f3c5e816a30d30d714a84765cfc29] | committer: Carl Eugen Hoyos

Return -1 on invalid input instead of crashing.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=364889cf9c1f3c5e816a30d30d714a84765cfc29
---

 libswscale/utils.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/libswscale/utils.c b/libswscale/utils.c
index 56920a1..fada192 100644
--- a/libswscale/utils.c
+++ b/libswscale/utils.c
@@ -710,7 +710,7 @@ int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange
 
 int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
 {
-    if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
+    if (!c || isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
 
     *inv_table = c->srcColorspaceTable;
     *table     = c->dstColorspaceTable;