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/uhitm.c

@@ -2047,7 +2047,7 @@ demonpet(void)
     i = !rn2(6) ? ndemon(u.ualign.type) : NON_PM;
     pm = i != NON_PM ? &mons[i] : gy.youmonst.data;
     if ((dtmp = makemon(pm, u.ux, u.uy, NO_MM_FLAGS)) != 0)
-        (void) tamedog(dtmp, (struct obj *) 0);
+        (void) tamedog(dtmp, (struct obj *) 0, FALSE);
     exercise(A_WIS, TRUE);
 }