Fix memory leak when iterating path

engine/breeze/util/object_pool.c

@@ -42,6 +42,16 @@ void bzObjectPoolDestroy(BzObjectPool *pool) {
     bzFree(pool);
 }
 
+size_t bzObjectPoolCalcNumFree(BzObjectPool *pool) {
+    size_t count = 0;
+    i32 idx = pool->firstFree;
+    while (idx != -1) {
+        count++;
+        i32 *object = bzObjectPoolGetObject(pool, idx);
+        idx = *object;
+    }
+    return count;
+}
 void *bzObjectPool(BzObjectPool *pool) {
     if (pool->firstFree == -1)
         return NULL;

engine/breeze/util/object_pool.h

@@ -13,6 +13,7 @@ typedef struct BzObjectPoolDesc {
 BzObjectPool *bzObjectPoolCreate(const BzObjectPoolDesc *desc);
 void bzObjectPoolDestroy(BzObjectPool *pool);
 
+size_t bzObjectPoolCalcNumFree(BzObjectPool *pool);
 void *bzObjectPool(BzObjectPool *pool);
 void *bzObjectPoolGetObject(BzObjectPool *pool, i32 idx);
 i32 bzObjectPoolGetIdx(BzObjectPool *pool, void *object);