delayed mimicing appearance change

Back in April, <Someone> reported to the list that when you are
polymorphed into a mimic and #monster, and return to human form while still
mimicing, your appearance does not change.  This was due to a change
between 3.4.0 and 3.4.1 that caused all mimicing to go thru one case and
the code to change appearance was actually never executed.

src/polyself.c

@@ -54,17 +54,9 @@ const char *fmt, *arg;
 	find_ac();
 	if (was_mimicking) {
 	    if (multi < 0) unmul("");
-	} else {
-	    /*
-	     * Clear any in-progress imitations -- the case where not a
-	     * mimic is handled above.
-	     *
-	     * Except, this is not complete if the hero ever gets the
-	     * chance to imitate anything, then s/he may be mimicing
-	     * gold, but not the way its done for eating a mimic.
-	     */
 	    youmonst.m_ap_type = M_AP_NOTHING;
 	}
+
 	newsym(u.ux,u.uy);
 
 	You(fmt, arg);