lavfi: do not segfault on NULL passed to avfilter_get_by_name()

f160c6a1 · Anton Khirnov · fa2a34cd · f160c6a1
Commit f160c6a1 authored Apr 07, 2013 by Anton Khirnov
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avfilter.c libavfilter/avfilter.c +3 -0

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--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -273,6 +273,9 @@ AVFilter *avfilter_get_by_name(const char *name)
 {
    AVFilter *f = NULL;

+    if (!name)
+        return NULL;
+
    while ((f = avfilter_next(f)))
        if (!strcmp(f->name, name))
            return f;