fixed bug of notice when has render and title bug no desc

examples/routers/notice.vue

@@ -6,6 +6,7 @@
         <Button @click="success(false)">成功</Button>
         <Button @click="warning(false)">警告</Button>
         <Button @click="error(false)">错误</Button>
+        <Button @click="testRender()">render</Button>
         <p>仅标题</p>
         <Button @click="info(true)">消息</Button>
         <Button @click="success(true)">成功</Button>
@@ -54,7 +55,7 @@
             warning (nodesc) {
                 this.$Notice.warning({
                     title: '这是通知标题',
-                    desc: nodesc ? '' : '这里是通知描述这里,是通知描述这里是通知描述这里,是通知描述这里,是通知描述这里是通知描述这里是通知描述'
+                    desc: nodesc ? '' : '这里是通知描述这里,是通知描述这里是通知描述这里,是通知描述这里,是通知描述这里是通知描述这里是通知描述',
                 });
             },
             error (nodesc) {
@@ -63,6 +64,20 @@
                     desc: nodesc ? '' : '这里是通知描述这里,是通知描述这里是通知描述这里,是通知描述这里,是通知描述这里是通知描述这里是通知描述'
                 });
             },
+            testRender () {
+                this.$Notice.info({
+                    title: '这是通知标题',
+                    duration: 0,
+                    // desc: '当你定义了render之后，这个描述会被覆盖',
+                    render: h => {
+                        return h('span', {}, [
+                            '这是',
+                            h('Button', {props: {type: 'text'}}, 'render'),
+                            '函数渲染的'
+                        ]);
+                    },
+                });
+            },
             destroy () {
                 this.$Notice.destroy();
             }

src/components/notice/index.js

@@ -45,7 +45,7 @@ function notice (type, options) {
 
     let withIcon;
 
-    const with_desc = (options.render && !title) ? '' : desc === '' ? '' : ` ${prefixCls}-with-desc`;
+    const with_desc = (options.render && !title) ? '' : (desc || options.render) ? ` ${prefixCls}-with-desc` : '';
 
     if (type == 'normal') {
         withIcon = false;