Prevent impossible with secret doors in sokoban

Doesn't currently happen as no Soko levels use secret doors,
but handle them anyway gracefully.

Secret doors have their doormask set, but it's overloaded wall_info.
The display routines aren't happy with D_CLOSED in wall_info.

diff --git a/src/detect.c b/src/detect.c
index 8c4edb1c136408cd6189639f206698ef32b3ade1..c251c047d86069c32fd72c2cc64da3da48475748 100644 (file)
--- a/src/detect.c
+++ b/src/detect.c
@@ -1851,6 +1851,8 @@ sokoban_detect(void)
         for (y = 0; y < ROWNO; y++) {
             levl[x][y].seenv = SVALL;
             levl[x][y].waslit = TRUE;
+            if (levl[x][y].typ == SDOOR)
+                levl[x][y].wall_info = 0; /* see rm.h for explanation */
             map_background(x, y, 1);
             if ((obj = sobj_at(BOULDER, x, y)) != 0)
                 map_object(obj, 1);