socket: Fix internal_select()
Bug found by Pavel Belikov ("Fragment N1"):
http://www.viva64.com/en/b/0414/#ID0ECDAE V
Victor Stinner committed
0cec877230a9232378eb2c7e21348029bbe83fea
Parent: 48e3f98
Bug found by Pavel Belikov ("Fragment N1"):
http://www.viva64.com/en/b/0414/#ID0ECDAE