res/res_pjsip/pjsip_options.c: Eliminate excessive RAII_VAR usage.

* Fix off nominal ref leak in find_or_create_contact_status().

* Add missing NULL check of status in update_contact_status() and
init_start_time().
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Merged revisions 422214 from http://svn.asterisk.org/svn/asterisk/branches/12
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Merged revisions 422215 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@422216 65c4cc65-6c06-0410-ace0-fbb531ad65f3