Fix Mutex

peer/cwtch_peer.go

@@ -433,6 +433,7 @@ func (cp *cwtchPeer) InviteOnionToGroup(onion string, groupid string) error {
 	cp.mutex.Lock()
 	group := cp.Profile.GetGroup(groupid)
 	if group == nil {
+		cp.mutex.Unlock()
 		return errors.New("invalid group id")
 	}
 	invite, err := group.Invite()