huffyuv: do not abort on unknown pix_fmt; instead, return an error.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
(cherry picked from commit 63c9de6469005974288f4e4d89fc79a590e38c06)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/libavcodec/huffyuv.c b/libavcodec/huffyuv.c
index d211964eca..eb13d87f87 100644
--- a/libavcodec/huffyuv.c
+++ b/libavcodec/huffyuv.c
@@ -514,7 +514,7 @@ s->bgr32=1;
         }
         break;
     default:
-        assert(0);
+        return AVERROR_INVALIDDATA;
     }
 
     alloc_temp(s);