If it fails, buffers aren't allocated, causing NULL pointer dereferencing.

Signed-off-by: Andreas Cadhalpun <andreas.cadhal...@googlemail.com>
---
 libavcodec/diracdec.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c
index bb314d0..e0604af 100644
--- a/libavcodec/diracdec.c
+++ b/libavcodec/diracdec.c
@@ -1975,7 +1975,9 @@ static int dirac_decode_picture_header(DiracContext *s)
             for (j = 0; j < MAX_FRAMES; j++)
                 if (!s->all_frames[j].avframe->data[0]) {
                     s->ref_pics[i] = &s->all_frames[j];
-                    get_buffer_with_edge(s->avctx, s->ref_pics[i]->avframe, 
AV_GET_BUFFER_FLAG_REF);
+                    ret = get_buffer_with_edge(s->avctx, 
s->ref_pics[i]->avframe, AV_GET_BUFFER_FLAG_REF);
+                    if (ret < 0)
+                        return ret;
                     break;
                 }
 
-- 
2.10.1

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