Nach Selbstzerstoerung keinen Code mehr ausfuehren

Change-Id: I2138eef1701f5eaa91a332d40df628f4984a60f3
diff --git a/obj/tools/MGtool.c b/obj/tools/MGtool.c
index a9aa220..027d1dd 100644
--- a/obj/tools/MGtool.c
+++ b/obj/tools/MGtool.c
@@ -1235,8 +1235,10 @@
     return;
   if(!cloner&&!((cloner=TP)||(cloner=ENV(ME)))&&!interactive(cloner))
     destruct(ME);
-  if(!IS_LEARNER(cloner))
+  if(!IS_LEARNER(cloner)) {
     destruct(ME);
+    return;
+  }
   SetProp(P_NODROP,"Das waere zu gefaehrlich.\n");
   SetProp(P_NEVERDROP,1);
   SetProp(P_NOBUY,1);