CVE-2014-0178 patch for 3.6

Samba 3.6.23 patch for:
FSCTL_GET_SHADOW_COPY_DATA: Initialize output array to, zero
...derived from Christof Schmitt <christof.schmitt@us.ibm.com>'s patch for Samba 4.0
http://www.samba.org/samba/ftp/patches/security/samba-4.0.17-CVE-2014-0178-CVE-2014-0239.patch

Bug: https://bugzilla.samba.org/show_bug.cgi?id=10549
CVE-2014-0178: Malformed FSCTL_SRV_ENUMERATE_SNAPSHOTS response