[CABMAN]
- Don't crash when a directory is specified instead of a file list (i.e. specified_files.root.normalized_name == NULL)

git-svn-id: svn://svn.reactos.org/reactos/trunk@63860 97493ccd-5924-5043-b1f5-66cb403b36ce
[SYSSETUP]
- Gracefully handle ConvertStringSidToSid failures in InstallBuiltinAccounts and InstallPrivileges. Fixes invalid frees in second stage.

git-svn-id: svn://svn.reactos.org/reactos/trunk@63861 97493ccd-5924-5043-b1f5-66cb403b36ce