bitmap.h (bitmap_iterator): Remove word_bit and bit fields.

	* bitmap.h (bitmap_iterator): Remove word_bit and bit
	fields. Rename others.
	(bmp_iter_common_next_1, bmp_iter_single_next_1,
	bmp_iter_single_init, bmp_iter_end_p, bmp_iter_single_next,
	bmp_iter_and_not_next_1, bmp_iter_and_not_init,
	bmp_iter_and_not_next, bmp_iter_and_next_1, bmp_iter_and_init,
	bmp_iter_and_next): Remove.
	(bmp_iter_set_init, bmp_iter_and_init, bmp_iter_and_compl_init,
	bmp_iter_next, bmp_iter_set, bmp_iter_and, bmp_iter_and_compl):
	New.
	(EXECUTE_IF_SET_IN_BITMAP, EXECUTE_IF_AND_IN_BITMAP,
	EXECUTE_IF_AND_COMPL_IN_BITMAP): Adjust.

From-SVN: r90055