fixed the map generator doing paths that hit the edge which made it look like the map was out of bounds.

map.hpp

@@ -67,6 +67,8 @@ public:
   Point map_to_camera(const Point &loc, const Point &cam_orig);
   Point center_camera(const Point &around, size_t view_x, size_t view_y);
 
+  void expand();
+
   void dump(int show_x=-1, int show_y=-1);
   bool INVARIANT();