[PATCH] msvcrt: Set errno when close() is called on already closed fd

[Piotr Caban]

Based on a patch by Olly Betts.
For bug #43902.

Signed-off-by: Piotr Caban <piotr(a)codeweavers.com>
---
  dlls/msvcrt/file.c       | 2 +-
  dlls/msvcrt/tests/file.c | 6 ++++++
  2 files changed, 7 insertions(+), 1 deletion(-)