babl-fish: handle case of no from_list in source

diff --git a/babl/babl-fish.c b/babl/babl-fish.c
index 0976de6160d918a48029b863670f4bee0d32180f..a5306550b07150dd8c55d4dc873c0e55024455c2 100644 (file)
--- a/babl/babl-fish.c
+++ b/babl/babl-fish.c
@@ -120,7 +120,8 @@ babl_conversion_find (const void *source,
 {
   void *data = (void*)destination;
 
-  babl_list_each (BABL (source)->type.from_list, match_conversion, &data);
+  if (BABL (source)->type.from_list)
+    babl_list_each (BABL (source)->type.from_list, match_conversion, &data);
   if (data != (void*)destination) /* didn't change */
     return data;
   data = NULL;