bug fix

src/pages/building/list/add/components/modalImage.jsx

               </Form.Item>
               <Form.Item label="面积" help="单位 ㎡">
                 {getFieldDecorator('buildingArea', {
-                  rules: [{ required: true, message: '请填写面积' },
+                  rules: [{ message: '请填写面积' },
                           {
                             pattern: new RegExp('^[0-9]*$'),
                             message: '只允许输入数字',