[PATCH 2/2 v2] msvcrt: Handle negative zero, infinity and nan in _ecvt and others.

[Piotr Caban]

From: Lauri Kenttä <lauri.kentta(a)gmail.com>

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=50885
Signed-off-by: Lauri Kenttä <lauri.kentta(a)gmail.com>
Signed-off-by: Piotr Caban <piotr(a)codeweavers.com>
---
  dlls/msvcrt/math.c         | 65 +++++++++++++++-----------------------
  dlls/msvcrt/tests/printf.c | 11 +++++++
  2 files changed, 36 insertions(+), 40 deletions(-)