don't reveal surface when Blind and levitating

<email deleted> wrote the following on April 10, 2006:
> When blind and levitating, you can produce a message - "You try to feel what
> is lying here on the ice. But you can't reach it!" - which reveals too much
> about the terrain below you.

doc/fixes34.4

@@ -204,6 +204,7 @@ cancelled nurses shouldn't say "Relax, this won't hurt a bit"
 check for hero location in digactualhole() before clearing u.utrap
 clear any pits that the hero digs in the vault guard's temporary corridor
 shattering a monster's weapon didn't work as intended for stack of N>1
+don't reveal surface information that you can neither feel or see
 
 
 Platform- and/or Interface-Specific Fixes

src/hack.c

@@ -1,4 +1,4 @@
-/*	SCCS Id: @(#)hack.c	3.5	2006/02/22	*/
+/*	SCCS Id: @(#)hack.c	3.5	2006/04/10	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -1967,6 +1967,8 @@ dopickup()
 	    else if (u.usteed && P_SKILL(P_RIDING) < P_BASIC)
 		rider_cant_reach();
 #endif
+	    else if (Blind && !can_reach_floor(TRUE))
+	        You("cannot reach anything here.");
 	    else
 		You("cannot reach the %s.", surface(u.ux,u.uy));
 	    return 0;

src/invent.c

@@ -1,4 +1,4 @@
-/*	SCCS Id: @(#)invent.c	3.5	2006/02/15	*/
+/*	SCCS Id: @(#)invent.c	3.5	2006/04/10	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -2269,9 +2269,13 @@ boolean picked_some;
 		    /* don't say "altar" twice, dfeature has more info */
 		    You("try to feel what is here.");
 		} else {
+		    const char *where = (Blind && !can_reach_floor(TRUE)) ?
+		    		      "lying beneath you" : "lying here on the ",
+		    	      *onwhat = (Blind && !can_reach_floor(TRUE)) ?
+		    	 		"" : surface(u.ux,u.uy);
 		    You("try to feel what is %s%s.",
-			drift ? "floating here" : "lying here on the ",
-			drift ? ""		: surface(u.ux, u.uy));
+			drift ? "floating here" : where,
+			drift ? ""		: onwhat);
 		}
 		if (dfeature && !drift && !strcmp(dfeature, surface(u.ux,u.uy)))
 			dfeature = 0;		/* ice already identifed */