修复【直播间信件往下滑，信件界面会显示为空】

live/src/main/java/com/yunbao/live/dialog/LiveUserAnchorMailBoxPopDialog.java

@@ -77,10 +77,12 @@ public class LiveUserAnchorMailBoxPopDialog extends AbsDialogPopupWindow {
                         empty.setVisibility(View.GONE);
                         list.setVisibility(View.VISIBLE);
                         return JSON.parseArray(Arrays.toString(info), LiveUserMailBoxModel.class);
-                    } else {
+                    } else if (adapter.getList().size() == 0) {
                         empty.setVisibility(VISIBLE);
                         list.setVisibility(GONE);
                         return new ArrayList<LiveUserMailBoxModel>();
+                    }else{
+                        return new ArrayList<>();
                     }
 
                 } else {