avfilter: allow freeing NULL.

this way avfilter_free() can be called without NULL checks. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
13 years ago · c5f9a66f74
parent a79af8e8cb
commit c5f9a66f74
1 changed files with 3 additions and 0 deletions
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@ -834,6 +834,9 @@ void avfilter_free(AVFilterContext *filter)
    int i;
    AVFilterLink *link;

+    if (!filter)
+        return;
+
    if (filter->filter->uninit)
        filter->filter->uninit(filter);