dlls/dinput/effect_linuxinput.c: Check return value of 'write'. (bug # 16413)

[Dan Kegel]

Damjan wrote:
>ssize_t ignored;
>...
>ignored = write(*(This->fd), &event, sizeof(event));
>
>You could make the ignored variable static, maybe even global.

Please don't.  We don't want to ignore the errors,
we want to handle them.  The changes you're
proposing are harmful to readability.  Better
to ignore the compiler warnings than to
paper them over like that.