Add a string pointer local variable, assign it and operate on it.
This should eliminate an exception and make LsapIsLocalComputer()
function operate correctly.
CORE-18996
CORE-14015, CORE-6942
This makes Windows 2003 CMD.EXE to start batch files again.
Addendum to commit 17d42ae2a (r58868).
Replaces PR #3084 by freely importing and adapting Wine patch
17110a0a89
```
advapi32: Improve the SaferComputeTokenFromLevel stub.
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=47274
Signed-off-by: Hans Leidekker <hans@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
```