[try3] ws2_32: Ignore EINTR poll result code in WS_select

[Dmitriy Anisimkov]

Alexandre Julliard wrote:
<<Your timeout computation is still wrong.>>

The timeout was wrong in twice and more interruptions.
Now the timeout should be quite right.
I sent this fix already at october first, but looks like nobody taken a look at it,
(or maybe i loose the reject).
I think it is an important fix for networking applications.
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Changelog:
 - Ignore EINTR result code from poll call in WS_select.