12867 - Uninitialized pointer read

Description:
The third arg for ldap_utf8strtok_r is supposed to be initialized.

https://fedorahosted.org/389/ticket/47965

Reviewed by mreynolds@redhat.com (Thank you, Mark!!)

(cherry picked from commit 62072539953d0956e0f2664ef1a3691cf8fbdac0)
(cherry picked from commit a2977b4b1839f4853594a46593ac5e2e27155bed)