GetEmptyReq and GetResReq cannot do this due to the final typecast -
typically requests that need either of those do not have their own typedef
in the protocol headers.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Jamey Sharp <jamey@minilop.net>
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>