fix: AST levels print

src/compiler/fzl_debug.c

@@ -27,6 +27,7 @@ void print_node(fzl_node_t *node, int level)
   if (!node)
     return;
 
+  print_level(levelbuf, level);
   strcpy(printbuf, levelbuf);
 
   switch (node->type)
@@ -202,7 +203,7 @@ void fzl_debug_print_ast(fzl_node_t *root)
   fzl_node_t *curr = root;
   while (curr != NULL)
   {
-    print_node(curr, 3);
+    print_node(curr, 2);
     curr = curr->next;
   }