Warnung gefixt

Change-Id: I44750f2fc7e6e9e7ebde57b5e969669c89f2cbfa
diff --git a/obj/mpa.c b/obj/mpa.c
index 0d8bdd7..ed1f0ac 100644
--- a/obj/mpa.c
+++ b/obj/mpa.c
@@ -1009,6 +1009,7 @@
     case -3: write(text4minus3+"\n"); return 0;
     default: write("Interner Fehler "+err+", Erzmagier verstaendigen!\n"); return 0;
   }
+  return 0;
 }
 
 static varargs int schreib(string str,string pretext,int called_by_itself,