用户头像走服务器获取

@@ -391,8 +391,9 @@ var chat = {
         var viewData = {};
         var chatMessage = cm.chatMessage;
         var allTypes = socketConf.recType;
-        //无用户头像，设置默认头像
-        cm.userHead = cm.userHead ? cm.userHead : userAvatar;
+
+        //设置默认用户头像
+        cm.userHead = userAvatar;
 
         switch (cm.type) {
             case allTypes.CU_SEND: