The vPos register returns the unnormalised position of the current
fragment to the pixel shader. This test tests for its functionality in
both onscreen and offscreen render targets. On- and offscreen targets
are used because of the inverted y coordinate.

include: Add defines for GetExceptionCode, GetExceptionInformation and AbnormalTermination to excpt.h for the MS compiler when using compiler exceptions.

Remove its initialisation from ole32.

rpcrt4: Use closesocket to close sockets and define it to close on Unix platforms to make the code more portable.