re PR c++/3716 (Template parameters that are pointers to member functions)

re PR c++/3716 (Template parameters that are pointers to member functions)

cp:
	PR c++/3716
	* pt.c (tsubst_aggr_type): Move pmf handling into tsubst.
	(tsubst, case POINTER_TYPE): Handle pmfs here.
	(tsubst, case OFFSET_TYPE): Check it is not an offset to
	reference. If it is offset to FUNCTION_TYPE, create a METHOD_TYPE.
testsuite:
	* g++.dg/template/ptrmem1.C: New test.
	* g++.dg/template/ptrmem2.C: New test.

From-SVN: r48471