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	UNIFY_ALLOW_NONE.
	(convert_nontype_argument): Use TYPE_PTRMEMFUNC_FN_TYPE.
	(resolve_overloaded_unification): Strip baselinks.
Fixes Sec14/10_2/P14264.C, Sec14/10_2/P14278.C, Sec14/10_2/C14413.cm.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@23980 138bc75d-0d04-0410-961f-82ee72b054a4