bug fix http://jira.yoho.cn:8888/browse/YH-3295 review by 阿瑟

@@ -58,7 +58,7 @@ export default class MsgCenterNormalCell extends React.Component {
 
 
                     <View style={styles.topContainer}>
                     <View style={styles.topContainer}>
                         <LittleRedDotImage
                         <LittleRedDotImage
-                            extra = {user.id}
+                            extra = {user.uid}
                             iconTap={this.props.onPressAvatar}
                             iconTap={this.props.onPressAvatar}
                             isRedDot={!isRead}
                             isRedDot={!isRead}
                             image={user.avatar}
                             image={user.avatar}