content为null处理

core/src/main/java/com/wecloud/im/service/impl/ImConversationServiceImpl.java

@@ -941,7 +941,7 @@ public class ImConversationServiceImpl extends BaseServiceImpl<ImConversationMap
         for (ImClient receiver : clientReceivers) {
             // 投递消息
             try {
-                couriers.deliver(imMessage, null, currentClient, receiver, WsResponseCmdEnum.CONVERSATION_EVENT_MSG);
+                couriers.deliver(imMessage, contentMap, currentClient, receiver, WsResponseCmdEnum.CONVERSATION_EVENT_MSG);
             } catch (Exception e) {
                 log.info("下发群会话事件失败，事件类型 {} 接收人 {}", imMessage.getMsgType(), JSON.toJSONString(receiver));
             }