poly'd quantum mechanic feedback

From a bug report:  if swallowed and blind
and in quantum mechanic form, hitting the engulfer would yield "the <mon>
disappears" even though you were still swallowed by <mon>.  The pre-teleport
criteria for whether you knew the target was there were different from the
post-teleport ones.  Make them match; swallower will remain sensed by touch
and won't be described as disappearing.

doc/fixes34.4

@@ -283,6 +283,8 @@ sinking into lava didn't track passage of time properly
 sinking into lava eventually burns away slime; sitting in it always does
 suppress corpse from bones data if death is due to being dissolved in lava
 suppress "you rise from the dead" if game ends due to be turned into slime
+don't give erroneous "<mon> disppears" message for hero poly'd into quantum
+	mechanic who hits engulfer while swallowed and blinded
 
 
 Platform- and/or Interface-Specific Fixes

src/uhitm.c

@@ -1,4 +1,4 @@
-/*	SCCS Id: @(#)uhitm.c	3.5	2006/06/21	*/
+/*	SCCS Id: @(#)uhitm.c	3.5	2006/12/02	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -1476,7 +1476,8 @@ register struct attack *mattk;
 		    /* record the name before losing sight of monster */
 		    Strcpy(nambuf, Monnam(mdef));
 		    if (u_teleport_mon(mdef, FALSE) &&
-			    u_saw_mon && !canseemon(mdef))
+			    u_saw_mon && !(canseemon(mdef) ||
+					   (u.uswallow && u.ustuck == mdef)))
 			pline("%s suddenly disappears!", nambuf);
 		}
 		break;