From: Reimar Döffinger <[email protected]>

Since it contains dimensions parsing an invalid one has rather
annoying effects.

Signed-off-by: Anton Khirnov <[email protected]>
---
 libavcodec/nuv.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/nuv.c b/libavcodec/nuv.c
index 7bace2e..7cb94cb 100644
--- a/libavcodec/nuv.c
+++ b/libavcodec/nuv.c
@@ -184,8 +184,8 @@ static int decode_frame(AVCodecContext *avctx, void *data, 
int *data_size,
     }
     if (c->codec_frameheader) {
         int w, h, q;
-        if (buf_size < 12) {
-            av_log(avctx, AV_LOG_ERROR, "invalid nuv video frame\n");
+        if (buf[0] != 'V' || buf_size < 12) {
+            av_log(avctx, AV_LOG_ERROR, "invalid nuv video frame (wrong 
codec_tag?)\n");
             return -1;
         }
         w = AV_RL16(&buf[6]);
-- 
1.7.7.1

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