include: Include winuser.h from generated oleidl.h header.

oleidl.h isn't usable without winuser.h being included first due to
using the LPMSG type, so explicitly include it by adding a cpp_quote
statement to oleidl.idl. In the PSDK it is implicitly included as
IDL-generated header includes windows.h, which in turn includes
winuser.h.

dlls/ole32/ole32_oleidl.idl

@@ -16,5 +16,4 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-cpp_quote("#include <winuser.h>")
 #include "oleidl.idl"

dlls/oleaut32/oleaut32_ocidl.idl

@@ -16,5 +16,4 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-cpp_quote("#include <winuser.h>")
 #include "ocidl.idl"

include/oleidl.idl

@@ -24,6 +24,8 @@ import "objidl.idl";
 
 interface IOleInPlaceActiveObject;
 
+cpp_quote("#include <winuser.h>")
+
 /*****************************************************************************
  * IOleTypes interface
  */