Redo the filters based on assumptions discussed in mingw-dvlpr list.

	Redo the filters based on assumptions discussed in mingw-dvlpr list.

	* include/_mingw.h: Add include of sdkddkver.h.
	* include/accctrl.h (_WIN32_WINNT): Use MACRO constant for comparison
	instead of integer.
	* include/cmnquery.h (_WIN32_WINNT): Ditto.
	* include/aclapi.h: Include _mingw.h.
	(_WIN32_WINNT): Use MACRO constant for comparison instead of integer
	and move filters to the end of the file.
	(UNICODE): Use __AW() macro for mapping non-specific symbols.
	* include/adsprop.h: Ditto.
	* include/aclui.h: Include _mingw.h.
	* include/afxres.h: Ditto.
	* include/amaudio.h: Ditto.
	* include/amvideo.h: Ditto.
	* include/amdevcod.h: Ditto.
	* include/aviriff.h: Ditto.
	* include/aygshell.h: Ditto.
	* include/basetsd.h: Ditto.
	* include/basetyps.h: Ditto.
	* include/bdatypes.h: Ditto.
	* include cderr.h: Ditto.
	* include/cguid.h: Ditto.
	* include/comcat.h: Ditto.
	* include/commctrl.h (_WIN32_IE): Remove commented out definition.
	(_WIN32_IE): Move filters to the end of the file.
	(UNICODE): Use __AW() macro for mapping non-specific symbols.
	(_WIN32_WINNT): Use MACRO constant for comparison instead of integer.