avformat/id3v2: fix memleak with empty strings

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

avformat/id3v2: fix memleak with empty strings
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
cc6a59d2 · Michael Niedermayer · b83d9077 · cc6a59d2
Commit cc6a59d2 authored Aug 11, 2016 by Michael Niedermayer
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id3v2.c libavformat/id3v2.c +4 -1

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--- a/libavformat/id3v2.c
+++ b/libavformat/id3v2.c
@@ -422,7 +422,10 @@ static void read_comment(AVFormatContext *s, AVIOContext *pb, int taglen,
        return;
    }

-    if (dst && dst[0]) {
+    if (dst && !*dst)
+        av_freep(&dst);
+
+    if (dst) {
        key = (const char *) dst;
        dict_flags |= AV_DICT_DONT_STRDUP_KEY;
    }