lavu/opt: fix crash in av_opt_next() in case the class has no options

a6d6b8a2 · Stefano Sabatini · 7fd467f7 · a6d6b8a2
Commit a6d6b8a2 authored Aug 09, 2012 by Stefano Sabatini
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opt.c libavutil/opt.c +2 -1

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--- a/libavutil/opt.c
+++ b/libavutil/opt.c
@@ -59,7 +59,8 @@ const AVOption *av_next_option(void *obj, const AVOption *last)
 const AVOption *av_opt_next(void *obj, const AVOption *last)
 {
    AVClass *class = *(AVClass**)obj;
-    if (!last && class->option[0].name) return class->option;
+    if (!last && class->option && class->option[0].name)
+        return class->option;
    if (last && last[1].name)           return ++last;
    return NULL;
 }