Rename variables in pathfinding.c to be more clear

game/pathfinding.h

@@ -5,15 +5,11 @@
 
 #include "components.h"
 
-typedef struct PathMove {
-    i8 x;
-    i8 y;
-} PathMove;
-
 typedef struct PathNode {
-    i32 weight; // g + h
+    i32 weight; // fCost = g + h
     i32 gCost; // from start cost
     i32 hCost; // to target cost
+    bool visited;
     TilePosition pos;
 } PathNode;
 
@@ -22,7 +18,7 @@ typedef struct PathfindingDesc {
     TilePosition target;
     BzObjectPool *pool;
     BzTileMap *map;
-    PathNode *heap;
+    PathNode *openSet; // heap
     Path *outPath;
 } PathfindingDesc;