nuv: check ff_rtjpeg_decode_frame_yuv420 return value

CC: libav-stable@libav.org

libavcodec/nuv.c

@@ -153,7 +153,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     NuvContext *c      = avctx->priv_data;
     AVFrame *picture   = data;
     int orig_size      = buf_size;
-    int keyframe;
+    int keyframe, ret;
     int result, init_frame = !avctx->frame_number;
     enum {
         NUV_UNCOMPRESSED  = '0',
@@ -263,7 +263,9 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     }
     case NUV_RTJPEG_IN_LZO:
     case NUV_RTJPEG:
-        ff_rtjpeg_decode_frame_yuv420(&c->rtj, &c->pic, buf, buf_size);
+        ret = ff_rtjpeg_decode_frame_yuv420(&c->rtj, &c->pic, buf, buf_size);
+        if (ret < 0)
+            return ret;
         break;
     case NUV_BLACK:
         memset(c->pic.data[0], 0, c->width * c->height);