chore: resolve undefined-field

lua/nvim-tree/buffers.lua

@@ -26,12 +26,26 @@ end
 ---@param node Node
 ---@return boolean
 function M.is_modified(node)
+  if not M.config.modified.enable then
+    return false
+  end
+
+  if not M._modified[node.absolute_path] then
+    return false
+  end
+
   local dir = node:as(DirectoryNode)
-  return node
-    and M.config.modified.enable
-    and M._modified[node.absolute_path]
-    and (not dir or M.config.modified.show_on_dirs)
-    and (not (dir and dir.open) or M.config.modified.show_on_open_dirs)
+  if dir then
+    if not M.config.modified.show_on_dirs then
+      return false
+    end
+
+    if dir.open and not M.config.modified.show_on_open_dirs then
+      return false
+    end
+  end
+
+  return true
 end
 
 ---A buffer exists for the node's absolute path