Adds a check for connection null on checking whether user joined a muc.
Adds a check for connection null on checking whether user joined a muc.

bhatvv/jitsi-meet-torture,jitsi/jitsi-meet-torture,jitsi/jitsi-meet-torture,jitsi/jitsi-meet-torture,jitsi/jitsi-meet-torture,jitsi/jitsi-meet-torture