[PATCH 1/5 v2] msvcrt/tests: Restore the multibyte codepage after the tests.

[Piotr Caban]

From: Akihiro Sagawa

N.B. _setmbcp() doesn't return the previous codepage.

Signed-off-by: Akihiro Sagawa 
Signed-off-by: Piotr Caban 
---
v2:
  - use _ismbblead instead of _mbsnextc in patch 3
  - add patch 5 that makes the behavior identical on broken input

dlls/msvcrt/tests/string.c | 9 ++++++---
  1 file changed, 6 insertions(+), 3 deletions(-)