Another tamedog message

Give a different message when a peaceful creature was tamed.
Allow suppressing this and the previous message, when the caller
handles messaging.

src/were.c

@@ -175,7 +175,7 @@ were_summon(
                 *visible += 1;
         }
         if (yours && mtmp)
-            (void) tamedog(mtmp, (struct obj *) 0);
+            (void) tamedog(mtmp, (struct obj *) 0, FALSE);
     }
     return total;
 }