[RTL]

[RTL]
- Fixed RtlMultiByteToUnicodeN & RtlAnsiCharToUnicodeChar prototype
- Added missing paged code marker to RtlAnsiCharToUnicodeChar
- Added a small hack to RtlAnsiCharToUnicodeChar. Indeed, when it's called during second stage, it's failing due to missing NLS table.
Probably usetup that doesn't define a registry entry. And then, FreeLdr just passes null pointer.

svn path=/trunk/; revision=50836