Unify check for unknown staircases in is_unknown_staircase.

1 files changed, 4 insertions, 1 deletions

diff --git a/crawl-ref/source/travel.h b/crawl-ref/source/travel.h
index 9c72237ab8..a6fb14fc94 100644
--- a/crawl-ref/source/travel.h
+++ b/crawl-ref/source/travel.h
@@ -59,7 +59,8 @@ void stop_running(void);
 void travel_init_new_level();
 void cycle_exclude_radius(const coord_def &p);
 void del_exclude(const coord_def &p);
-void set_exclude(const coord_def &p, int radius = LOS_RADIUS, bool autoexcl = false);
+void set_exclude(const coord_def &p, int radius = LOS_RADIUS,
+                 bool autoexcl = false);
 void maybe_remove_autoexclusion(const coord_def &p);
 std::string get_exclusion_desc();
 void clear_excludes();
@@ -74,6 +75,8 @@ const char *trap_name(const coord_def &p);
 void explore_pickup_event(int did_pickup, int tried_pickup);
 bool is_excluded(const coord_def &p);
 bool feat_is_traversable(dungeon_feature_type feat);
+bool is_unknown_stair(const coord_def &p,
+    dungeon_feature_type remembered_feat = NUM_REAL_FEATURES);
 
 void find_travel_pos(const coord_def& youpos, char *move_x, char *move_y,
                      std::vector<coord_def>* coords = NULL);