[PATCH 2/3 v2] msvcrt: Don't set error in wcstombs_s_l if no characters to convert.

[Piotr Caban]

From: Daniel Lehman <dlehman(a)esri.com>

Signed-off-by: Daniel Lehman <dlehman(a)esri.com>
Signed-off-by: Piotr Caban <piotr(a)codeweavers.com>
---
  dlls/msvcrt/tests/string.c | 4 ++--
  dlls/msvcrt/wcs.c          | 2 ++
  2 files changed, 4 insertions(+), 2 deletions(-)