【修复】解决了当未传out_trade_no时，可能会出现商户订单号重复的错误提示问题

uni_modules/uni-pay/components/uni-pay/uni-pay.vue

@@ -267,8 +267,8 @@
 					provider: options.provider,
 					total_fee: options.total_fee,
 					openid: myOpenid,
-					order_no: options.order_no || this.res.order_no,
-					out_trade_no: options.out_trade_no || this.res.out_trade_no,
+					order_no: options.order_no,
+					out_trade_no: options.out_trade_no,
 					description: options.description,
 					type: options.type,
 					qr_code: options.qr_code,
@@ -538,8 +538,8 @@
 				let createOrderData = {
 					provider: options.provider,
 					total_fee: options.total_fee,
-					order_no: options.order_no || this.res.order_no,
-					out_trade_no: options.out_trade_no || this.res.out_trade_no,
+					order_no: options.order_no,
+					out_trade_no: options.out_trade_no,
 					description: options.description,
 					type: options.type,
 					custom: options.custom,