avcodec/smvjpegdec: Dont ignore avcodec_close() return code

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

libavcodec/smvjpegdec.c

@@ -180,13 +180,14 @@ static av_cold int smvjpeg_decode_end(AVCodecContext *avctx)
 {
     SMVJpegDecodeContext *s = avctx->priv_data;
     MJpegDecodeContext *jpg = &s->jpg;
+    int ret;
 
     jpg->picture_ptr = NULL;
     av_frame_free(&s->picture[0]);
     av_frame_free(&s->picture[1]);
-    avcodec_close(s->avctx);
+    ret = avcodec_close(s->avctx);
     av_freep(&s->avctx);
-    return 0;
+    return ret;
 }
 
 static const AVClass smvjpegdec_class = {