Referenzobjekte ohne Environment behandeln

Kommen in Form von Raeumen und auch anderer
Objekte vor.

Change-Id: Ica35406cdf744b1666f895737b560a7623e12b42
diff --git a/std/player/viewcmd.c b/std/player/viewcmd.c
index bbe02e0..104e9f3 100644
--- a/std/player/viewcmd.c
+++ b/std/player/viewcmd.c
@@ -365,7 +365,7 @@
       // unser environment enthaelt.
       else
       {
-        object *all_envs=all_environment(ref_object);
+        object *all_envs=all_environment(ref_object) || ({});
         int i=member(all_envs, environment());
         if (i >= 0)
         {