lavc/libx264.c: Fix possible UB by NULL pointer LHS

It is UB to attempt to do pointer arithmetic on NULL pointer LHS, even if that pointer arithmetic ends up being "+= 0" (i.e. !!p == 0 if p == NULL).

1 files changed, 3 insertions, 1 deletions

diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index 14177b3016..616d855067 100644
--- a/libavcodec/libx264.c
+++ b/libavcodec/libx264.c
@@ -940,7 +940,9 @@ static av_cold int X264_init(AVCodecContext *avctx)
                     return ret;
             }
             p= strchr(p, ':');
-            p+=!!p;
+            if (p) {
+                ++p;
+            }
         }
     }