re PR c++/19311 (ICE in resolve_overloaded_unification)

re PR c++/19311 (ICE in resolve_overloaded_unification)

	PR c++/19311
	* init.c (build_offset_ref): Don't build non-dependent SCOPE_REF.
	* pt.c (build_non_dependent_expr): Don't build NON_DEPENDENT_EXPR
	for OFFSET_TYPE.
	* typeck.c (build_x_unary_op): Don't build non-dependent SCOPE_REF.
	Also set PTRMEM_OK_P for NON_DEPENDENT_EXPR.
	(build_unary_op): Handle building ADDR_EXPR of OFFSET_REF inside
	template.

	* g++.dg/template/non-dependent11.C: New test.

From-SVN: r95975