Fix for broken wine AllocateAndGetTcpExTableFromStack() implementation.

Fix for broken wine AllocateAndGetTcpExTableFromStack() implementation.

On wine (tested with 1.5.6) the mentioned function could not be located in
iphlpapi.dll using LoadLibrary()/GetProcAddress(), which is the prefered
method to get a tcp peer pid on WinXP <= SP2.
To workaround this limitation we use GetExtendedTcpTable() first to get the peer pid.
If this fails (which happens at least on real WinXP SP2) we then use
AllocateAndGetTcpExTableFromStack() to get the pid.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=66060
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>