消息中心修改

@@ -16,7 +16,7 @@ import (
 
 func MessageCenter(header *protocol.RequestHeader, request *protocol.MessageCenterRequest) (rsp *protocol.MessageCenterResponse, err error) {
 	var (
-		list             []*protocol.MessageTotal
+		list             []*protocol.MessageTotal = make([]*protocol.MessageTotal, 0)
 		interactionCount int
 	)
 	rsp = &protocol.MessageCenterResponse{}