0.7.5.15:

0.7.5.15:
	fixed handling of INTERSECTION-TYPE corner case in
		DEFTRANSFORM %DATA-VECTOR-AND-INDEX (used to fail with
		TYPE-ERROR at compile time) by making DEFTRANSFORMs
		call UPGRADED-ELEMENT-TYPE-SPECIFIER-OR-GIVE-UP instead
		of assuming ARRAY-TYPE and calling
		ARRAY-TYPE-SPECIALIZED-ELEMENT-TYPE directly