修复点击推送启动APP闪退的问题

Author: guangyao

ios/RNNeteaseIm/RNNeteaseIm/RNNeteaseIm.m

@@ -55,6 +55,9 @@ - (void)clickObserveNotification:(NSNotification *)noti{
             NIMTeam *team = [[[NIMSDK sharedSDK] teamManager]teamById:strSessionId];
             strSessionName = team.teamName;
         }
+        if (!strSessionName) {
+            strSessionName = @"";
+        }
         [mutaDict setObject:strSessionName forKey:@"sessionName"];
         [param setObject:mutaDict forKey:@"sessionBody"];
         if ([[dict objectForKey:@"type"] isEqualToString:@"launch"]) {