vc1, mss2: Check for any negative return value from ff_vc1_parse_frame_header

This is required if we return other error codes than explicitly
-1, which so far has been the only other possible return value
besides 0.

Signed-off-by: Martin Storsjö <martin@martin.st>

1 files changed, 2 insertions, 2 deletions

diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index a3b6031752..86806b1d21 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -5464,11 +5464,11 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data,
     // do parse frame header
     v->pic_header_flag = 0;
     if (v->profile < PROFILE_ADVANCED) {
-        if (ff_vc1_parse_frame_header(v, &s->gb) == -1) {
+        if (ff_vc1_parse_frame_header(v, &s->gb) < 0) {
             goto err;
         }
     } else {
-        if (ff_vc1_parse_frame_header_adv(v, &s->gb) == -1) {
+        if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
             goto err;
         }
     }