Ticket #47773 - mem leak in do_bind when there is an error
https://fedorahosted.org/389/ticket/47773
Reviewed by: nhosoi (Thanks!)
Branch: 389-ds-base-1.3.2
Fix Description: Do not get the SLAPI_BIND_TARGET_SDN from the pblock and
free it in the clean up code if it was never set in the pblock - just free
the local variable sdn in this case.
Platforms tested: RHEL6 x86_64
Flag Day: no
Doc impact: no
(cherry picked from commit 2a57b521b86b24c0f0a8ddfbea4169c71ee4e896)