some tabs to spaces

cd src
    grep -P -n '\t' *.c | grep -v "1:"
    cd ../include
    grep -P -n '\t' *.h | grep -v "1:"
    cd ..

side note: win/Qt/*.cpp are full of tabs

src/dungeon.c

@@ -753,7 +753,7 @@ init_dungeons(void)
     (void) memset(&pd, 0, sizeof (struct proto_dungeon));
     pd.n_levs = pd.n_brs = 0;
 
-    L = nhl_init(&sbi);	/* private Lua state for this function */
+    L = nhl_init(&sbi); /* private Lua state for this function */
     if (!L) {
         panic1("'nhl_init' failed; can't continue.");
         /*NOTREACHED*/