[PATCH] msvcrt: Change how fread splits reading into chunks

[Piotr Caban]

It affects fd stream position and buffer content on unsuccessul reads.
For bug #43116.

Signed-off-by: Piotr Caban <piotr(a)codeweavers.com>
---
  dlls/msvcrt/file.c       |  6 +++---
  dlls/msvcrt/tests/file.c | 28 ++++++++++++++++++++++++++--
  2 files changed, 29 insertions(+), 5 deletions(-)