[PATCH] include: Introduce WINE_UNICODE_CHAR16 that allows using char16_t as Windows WCHAR.

[Jacek Caban]

From: Kevin Puetz <PuetzKevinA(a)JohnDeere.com>

This is useful for winelib applications that don't use -fshort-wchar. 
They may use u"" for string literals and u16string. However, C++ has 
builtin char16_t type, so we need WCHAR to be compatible with that.

Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---
  include/sqltypes.h | 4 +++-
  include/tchar.h    | 4 +++-
  include/winnt.h    | 9 ++++++---
  include/winnt.rh   | 6 ++++--
  4 files changed, 16 insertions(+), 7 deletions(-)