fix:修复一处空指针异常

live/src/main/java/com/yunbao/live/views/PortraitLiveManager.java

@@ -1371,6 +1371,9 @@ public class PortraitLiveManager implements LivePlayListener, SocketMessageListe
      * 退出直播间
      */
     public void exitLiveRoom() {
+        if(mLiveBean==null) {
+            return;
+        }
         RongChatRoomClient.getInstance().quitChatRoom("g" + mLiveBean.getUid(), new IRongCoreCallback.OperationCallback() {
             @Override
             public void onSuccess() {