7a8f19a LDAP: Initialize user count for AD matching rule

Authored and Committed by jhrozek 9 years ago
    LDAP: Initialize user count for AD matching rule
    
    https://fedorahosted.org/sssd/ticket/2157
    
    If AD matching rule was selected, but the group was empty, the SSSD
    accessed random data. Initializing count to zero prevents that.