libhb: fix crash in hb_filter_info_close

filter info can be null, which caused a crash

diff --git a/libhb/common.c b/libhb/common.c
index 9f7a917de74810cd44e82245ed91067592dee696..1b8c0f4b7de09e51acf95af19a7d346f8397f589 100644 (file)
--- a/libhb/common.c
+++ b/libhb/common.c
@@ -3826,7 +3826,10 @@ void hb_filter_info_close( hb_filter_info_t ** _fi )
 {
     hb_filter_info_t * fi = *_fi;
 
-    free(fi->human_readable_desc);
+    if (fi != NULL)
+    {
+        free(fi->human_readable_desc);
+    }
 
     free( fi );
     *_fi = NULL;