[PATCH] msvcrt: Improve strtod precision.

[Piotr Caban]

This patch fixes strtod precision regression. It also removes floating
points operations.

Signed-off-by: Piotr Caban <piotr(a)codeweavers.com>
---
  dlls/msvcrt/msvcrt.h         |   1 +
  dlls/msvcrt/string.c         | 157 ++++++++++++++++++++++++-----------
  dlls/ucrtbase/tests/string.c |  20 +++--
  3 files changed, 123 insertions(+), 55 deletions(-)