fix for crash in process_incoming_notify_rlmi_resub/
sipe_subscribe_presence_single
https://sourceforge.net/forum/forum.php?thread_id=
3278979&forum_id=688535
in LCS2005 cid attribute does not exist if state is resubscribe, so crash happened.
Example:
<resource uri="sip:first.last@domain.com.au" >
<instance id="0" state="resubscribe" />
</resource>
<resource uri="sip:first2.last2@domain.com" >
<instance id="0" state="active" cid="sip:first2.last2@domain.com" />
</resource>
also removed unused variables.