fix #M108 - seeing while asleep

I think being asleep or unconscious ought to override vision the way
that being blinded does, but that's a more ambitious change than I care to
tackle.  This replaces You("see ...") with You_see("..."), comparable to
You_hear().  It catches the reported door case and several variations of
light sources burning out while on the floor rather than in inventory, but
it probably misses some other cases.  zap_over_floor() in particular is
highly suspect.

src/engrave.c

@@ -1,4 +1,4 @@
-/*	SCCS Id: @(#)engrave.c	3.5	2005/06/02	*/
+/*	SCCS Id: @(#)engrave.c	3.5	2005/06/22	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -335,7 +335,7 @@ register int x,y;
 		 */
 		if(!Blind) {
 			sensed = 1;
-			You("see a message scrawled in blood here.");
+			You_see("a message scrawled in blood here.");
 		}
 		break;
 	    default: