msvcrt: Make first call to fwrite bufferred

[Piotr Caban]

Please ignore this patch, it slows down fwrite on unbuffered FILE's.

On 10/21/13 15:43, Piotr Caban wrote:
> Without this patch fwrite allocates the buffer on first call and doesn't
> use it.
> ---
>   dlls/msvcrt/file.c | 125
> +++++++++++++++++++++++------------------------------
>   1 file changed, 54 insertions(+), 71 deletions(-)
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