LDAP Realtime Peers Cannot Register

Prior to 1.8, it was not necessary for an explicit "type" to be set for an
asterisk LDAP realtime peer. Now the routine find_peer actually checks the
type field during registration and fails to find the peer if it is not set.

The attached patch makes the realtime type equal whatever type is being 
searched for if the type is 0 upon return from routine build_peer. 

(closes issue ASTERISK-17222)
Reported by: John Covert
Patch by: David Vossel
Tested by: Darren Sessions

Review: https://reviewboard.asterisk.org/r/2095/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@372290 65c4cc65-6c06-0410-ace0-fbb531ad65f3