增加读取邮件逻辑容错

script/module/mail/MailManager.lua

@@ -174,7 +174,10 @@ function getMails(receiverUuid,mailType)
 		-- 	break
 		-- end
 
-		local res, err = pcall(LuaMongo.next, mail)
+		local res, err = pcall(function ()
+			return LuaMongo.next(mail)
+		end)
+
 		if not res then
 			Log.write(Log.LOGID_DEBUG, "MailManager.getMails err = ".. err)
 			break