PJSIP: Prevent crash no-URI contacts

This prevents a crash from occurring when a contact with no URI is used
for the creation of an outbound out-of-dialog request with no
associated endpoint.


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/12@420949 f38db490-d61c-443f-a65b-d21fe96a405b
res_pjsip_send_to_voicemail.c: Fix svn file properties.

git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/12@420956 f38db490-d61c-443f-a65b-d21fe96a405b