!156 修复 用户管理 -> 修改用户 手机号码 和 邮箱 不能清空

Merge pull request !156 from li_oxen/N/A

@@ -141,8 +141,8 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
  			<if test="deptId != null and deptId != 0">dept_id = #{deptId},</if>
  			<if test="deptId != null and deptId != 0">dept_id = #{deptId},</if>
  			<if test="userName != null and userName != ''">user_name = #{userName},</if>
  			<if test="userName != null and userName != ''">user_name = #{userName},</if>
  			<if test="nickName != null and nickName != ''">nick_name = #{nickName},</if>
  			<if test="nickName != null and nickName != ''">nick_name = #{nickName},</if>
- 			<if test="email != null and email != ''">email = #{email},</if>
- 			<if test="phonenumber != null and phonenumber != ''">phonenumber = #{phonenumber},</if>
+ 			<if test="email != null ">email = #{email},</if>
+ 			<if test="phonenumber != null ">phonenumber = #{phonenumber},</if>
  			<if test="sex != null and sex != ''">sex = #{sex},</if>
  			<if test="sex != null and sex != ''">sex = #{sex},</if>
  			<if test="avatar != null and avatar != ''">avatar = #{avatar},</if>
  			<if test="avatar != null and avatar != ''">avatar = #{avatar},</if>
  			<if test="password != null and password != ''">password = #{password},</if>
  			<if test="password != null and password != ''">password = #{password},</if>