window_init

	window_init(void)

	This routine initializes the data structures for the
	"window_" window management routines.  If the window_intype
	routine is used or window_construct(_c) is the first "window_"
	routine called, this routine doesn't have to be called.

	Related functions:

	window_intype, window_construct(_c), window_create(_c),
	window_update_background_c, intro_tv_windows

	C/C++ usage:

	window_init();