Fix possible segfault

Commited in SoC by Bobby Bingham on 2007-07-14 23:16:15

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@12689 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c
index 5211c762e1846153d68261b1c7f730035c10a564..d4b6bf1b871bb0c9a1d16f36e3b48df6e0ea9e3e 100644 (file)
--- a/libavfilter/avfiltergraph.c
+++ b/libavfilter/avfiltergraph.c
@@ -112,7 +112,8 @@ int avfilter_graph_load_chain(AVFilterGraph *graph,
 
 fail:
     destroy_graph_filters(graph);
-    *first = *last = NULL;
+    if(first) *first = NULL;
+    if(last)  *last  = NULL;
     return -1;
 }