Fix handling of Aiptek and Aiptek-like graphical tablets such as Trust on

Fix handling of Aiptek and Aiptek-like graphical tablets such as Trust on

2005-07-13  Robert Ögren  <gtk@roboros.com>

	Fix handling of Aiptek and Aiptek-like graphical tablets such as Trust
	on Windows. (#167004, thanks to	"pnohant" for testing)

	Code cleanup: Remove the unused and unmaintained code for using a
	non-system tablet context (USE_SYSCONTEXT ifdef:s), suggested
	by Tor Lillqvist.

	* gdk/win32/gdkinput-win32.c (_gdk_input_wintab_init_check): Handle
	tablet drivers that don't support WTI_DDCTXS/WTI_DSCTXS gracefully.
	Sligthly reorganize and simplify the code to support this.
	(_gdk_input_wintab_init_check, _gdk_input_other_event): Remove
	USE_SYSCONTEXT ifdef:s and the code for the case it was not defined.
	(gdk_input_window_find_within): Removed.