added using invisible border element for Mirror Magic game engine

diff --git a/src/tools.c b/src/tools.c
index e9ee41ae18e4208676b975b1b80f984b85b24c12..3dd167c7ce84f5e8cb200bda990cc006cc7542c8 100644 (file)
--- a/src/tools.c
+++ b/src/tools.c
@@ -1360,6 +1360,10 @@ void SetBorderElement()
 
   BorderElement = EL_EMPTY;
 
+  /* the MM game engine does not use a visible border element */
+  if (level.game_engine_type == GAME_ENGINE_TYPE_MM)
+    return;
+
   for (y = 0; y < lev_fieldy && BorderElement == EL_EMPTY; y++)
   {
     for (x = 0; x < lev_fieldx; x++)