.NET Framework / old .NET Core seems to allocate not more space than
necessary for the fd_set inputs, so if the allocation fell on the edge
of the end of the heap, Wine tried to read past it.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52259Signed-off-by: Torge Matthies <openglfreak@googlemail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>