Fixes: mem leak
Fixes: 
62164/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_UTVIDEO_fuzzer-6666804266926080

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
 libavcodec/utvideodec.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/libavcodec/utvideodec.c b/libavcodec/utvideodec.c
index 7ee07209d47..4987ee0196a 100644
--- a/libavcodec/utvideodec.c
+++ b/libavcodec/utvideodec.c
@@ -985,10 +985,6 @@ static av_cold int decode_init(AVCodecContext *avctx)
         return AVERROR_INVALIDDATA;
     }
 
-    c->buffer = av_calloc(avctx->width + 8, c->pro?2:1);
-    if (!c->buffer)
-        return AVERROR(ENOMEM);
-
     av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &h_shift, &v_shift);
     if ((avctx->width  & ((1<<h_shift)-1)) ||
         (avctx->height & ((1<<v_shift)-1))) {
@@ -1036,6 +1032,10 @@ static av_cold int decode_init(AVCodecContext *avctx)
         return AVERROR_INVALIDDATA;
     }
 
+    c->buffer = av_calloc(avctx->width + 8, c->pro?2:1);
+    if (!c->buffer)
+        return AVERROR(ENOMEM);
+
     return 0;
 }
 
-- 
2.17.1

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