fleeing mimics

Reported to the list back in November: scaring a mimicing mimic will
produce a "turns to flee" message, but the mimic does not unmimic nor
does it flee.  The latter behavior made sense to me as a defense mechanism,
so I changed monflee to avoid printing the message in this case.

doc/fixes34.4

@@ -17,6 +17,7 @@ usmellmon() instead of "It turns into it" during monster polymorph
 grammar of messages regarding eating artifacts
 avoid a message about an invisible monster looking much better
 player polymorphed as a xorn could not pick up items in pits
+don't display "turns to flee" message for a mimicing mimic
 
 
 Platform- and/or Interface-Specific Fixes

src/monmove.c

@@ -217,7 +217,9 @@ boolean fleemsg;
 		if (fleetime == 1) fleetime++;
 		mtmp->mfleetim = min(fleetime, 127);
 	    }
-	    if (!mtmp->mflee && fleemsg && canseemon(mtmp) && !mtmp->mfrozen)
+	    if (!mtmp->mflee && fleemsg && canseemon(mtmp) && !mtmp->mfrozen &&
+		mtmp->m_ap_type != M_AP_FURNITURE &&
+		mtmp->m_ap_type != M_AP_OBJECT)
 		pline("%s turns to flee!", (Monnam(mtmp)));
 	    mtmp->mflee = 1;
 	}