From 1a1adfee3ed55f7b615f57f551ae95b964ad6211 Mon Sep 17 00:00:00 2001
From: Pasi Kallinen <paxed@alt.org>
Date: Fri, 23 Dec 2016 13:34:06 +0200
Subject: [PATCH] Fix valgrind complaint in wizmode terrain

The code was writing characters into row[x-1] in the loop, but putting the
string terminator at row[x], leaving one character between uninitialized.
---
 src/cmd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/cmd.c b/src/cmd.c
index 317405b45..a1020bdba 100644
--- a/src/cmd.c
+++ b/src/cmd.c
@@ -920,6 +920,7 @@ wiz_map_levltyp(VOID_ARGS)
                                           ? 'a' + terrain - 10
                                           : 'A' + terrain - 36);
         }
+        x--;
         if (levl[0][y].typ != STONE || may_dig(0, y))
             row[x++] = '!';
         row[x] = '\0';