Specify that select() fails when descriptor parameters are empty

[MarekVCodasip]

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[Copilot]

Pull Request Overview

This PR clarifies the documentation for the Winsock2 select() function by specifying that the function fails not only when all three descriptor parameters are null, but also when they are empty.

• Updates error condition documentation to include empty descriptor parameters as a failure case

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[Copilot]

[nitpick] The sentence structure is unclear due to missing articles. Consider rewording to: 'The time-out value is not valid, or all three descriptor parameters were null or the descriptor parameters are empty.'

Suggested change

	The <i>time-out</i> value is not valid, or all three descriptor parameters were <b>null</b> or descriptor parameters are empty.
	The <i>time-out</i> value is not valid, or all three descriptor parameters were <b>null</b> or the descriptor parameters are empty.