Ticket #48048 - Fix coverity issues - 2015/2/24
Coverity defect 13032 - Explicit null dereferenced (FORWARD_NULL)
Coverity defect 13033 - Explicit null dereferenced (FORWARD_NULL)
4overity defect 13034 - Explicit null dereferenced (FORWARD_NULL)
Description: Added NULL check for operation and e.
modified: pw_send_ldap_result, update_pw_info, and check_pw_syntax_ext in pw.c