Fix 2 possible NullPointer occurences

marco

2015-10-17 1aec17636d8c548257cb307f8cc1e41354e00421

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dn: CN=Git_Group_Without_Members,OU=Groups,OU=UserControl,OU=MyOrganization,DC=MyDomain
objectClass: top
objectClass: group
cn: Git_Group_Without_Members
sAMAccountName: Git_Group_Without_Members