* include/aclui.h: Replace __OBJC__ guard with _OBJC_NO_COM.

	* include/aclui.h: Replace __OBJC__ guard with _OBJC_NO_COM.
	* include/basetyps.h:  Likewise.
 	(_COM_interface): New define.
	(interface): Define to _COM_interface, conditional on !__OBJC__.
	Replace 'interface' with '_COM_interface', throughout.
  	* include/comcat.h: Replace 'interface' with '_COM_interface', throughout.
	* include/commdlg.h: Replace __OBJC__ guard with _OBJC_NO_COM.
	* include/docobj.h: Replace 'interface' with '_COM_interface', throughout.
	* include/mshtml.h: Likewise.
	* include/oaidl.h: Likewise.
	* include/objfwd.h: Likewise.
	* include/objidl.h: Likewise.
	* include/ocidl.h: Likwise.
	* include/olectl.h: Likewise.
	* include/oleidl.h: Likewise.
	* include/shlobj.h: Likewise.
	* include/shlwapi.h: Replace __OBJC__ guard with _OBJC_NO_COM.
	* include/vfw.h: Likewise.
	* include/windows.h. Likewise. Add comment.
	* include/directx/d3d9.h: Replace 'interface' with '_COM_interface',
	throughout.

	* lib/test.c: Replace __OBJC__ guard with _OBJC_NO_COM.
	Add test for conflict with '@interface'