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examples/avio_reading: fix null dereference on error

Fixed CID1197052
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 419800acc46afc0c3b7319d6e216d0da207ebbb7)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Michael Niedermayer authored on 2014/04/06 07:39:58
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doc/examples/avio_reading.c
History View file @ 34592d0
... ... 
@@ -119,8 +119,10 @@ int main(int argc, char *argv[])
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 end:
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     avformat_close_input(&fmt_ctx);
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     /* note: the internal buffer could have changed, and be != avio_ctx_buffer */
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-    av_freep(&avio_ctx->buffer);
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-    av_freep(&avio_ctx);
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+    if (avio_ctx) {
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+        av_freep(&avio_ctx->buffer);
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+        av_freep(&avio_ctx);
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+    }
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     av_file_unmap(buffer, buffer_size);
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     if (ret < 0) {