优化 upload 重载处代码细节

src/modules/upload.js

@@ -495,9 +495,9 @@ layui.define(['lay','layer'], function(exports){
   
   // 重置方法
   Class.prototype.reload = function(opts){
-    options = options || {};
-    delete options.elem;
-    delete options.bindAction;
+    opts = opts || {};
+    delete opts.elem;
+    delete opts.bindAction;
     
     var that = this;
     var options = that.config = $.extend({}, that.config, upload.config, opts);