Keep BIT_PATH after maze generation

It's the more intuitive thing to do and it comes at no cost.

src/maze.c

@@ -109,7 +109,7 @@ static void remove_intermediate_bits(struct maze *maze)
 	int x, y;
 	for (y = 0; y < maze->height; y += 2) {
 		for (x = 0; x < maze->width; x += 2) {
-			MAZE_GET(maze, x, y) &= ~(BIT_ADDED | BIT_PATH);
+			MAZE_GET(maze, x, y) &= ~BIT_ADDED;
 		}
 	}
 }
@@ -123,9 +123,11 @@ static void connect_paths(struct maze *maze)
 		for (x = 0; x < maze->width; x += 2) {
 			TILE_TYPE t = MAZE_GET(maze, x, y);
 			if (t & BIT_RIGHT)
-				MAZE_GET(maze, x + 1, y) = BIT_LEFT | BIT_RIGHT;
+				MAZE_GET(maze, x + 1, y) =
+					BIT_PATH | BIT_LEFT | BIT_RIGHT;
 			if (t & BIT_DOWN)
-				MAZE_GET(maze, x, y + 1) = BIT_UP | BIT_DOWN;
+				MAZE_GET(maze, x, y + 1) =
+					BIT_PATH | BIT_UP | BIT_DOWN;
 		}
 	}
 }

src/maze.h

@@ -10,7 +10,8 @@
  * and consequently the bottom right tile will be a node just as the top left
  * will be. Going from the top left to the bottom right, following the path
  * directions specified by the tile bits will never lead one to out-of-bounds
- * coordinates, and all nodes will be reachable along the way. */
+ * coordinates, and all nodes will be reachable along the way. All tiles part of
+ * the path are marked with BIT_PATH. */
 struct maze {
 	int width, height;
 	TILE_TYPE *tiles;

src/tile.h

@@ -10,20 +10,20 @@ typedef unsigned char TILE_TYPE;
 #define BIT_LEFT  0x04
 #define BIT_DOWN  0x08
 
-/* These bits used while making the maze and are cleared afterward. They can be
- * reused later. */
-/* The tile has been added to the list of heads. */
-#define BIT_ADDED 0x10
 /* A path has been placed in the tile. */
-#define BIT_PATH  0x20
+#define BIT_PATH  0x10
+
+/* The tile has been added to the list of heads. This bit is used while making
+ * the maze and is cleared afterward. It can be reused later.*/
+#define BIT_ADDED 0x20
 
 /* This bit shows that the player sees the tile. (Reused BIT_ADDED.) */
-#define BIT_PLAYER_SEEN 0x10
+#define BIT_PLAYER_SEEN 0x20
 
-/* This bit shows that a monster is obstructing the tile. (Reused BIT_PATH.) */
-#define BIT_MONSTER 0x20
+/* This bit shows that a monster is obstructing the tile. */
+#define BIT_MONSTER 0x40
 
 /* This bit shows that there's cash in the tile. */
-#define BIT_CASH 0x40
+#define BIT_CASH 0x80
 
 #endif /* TILE_H_ */

src/version.h

@@ -1,2 +1,2 @@
 /* The version of the program: */
-#define VERSION "0.5.10"
+#define VERSION "0.5.11"