varasm.c (get_section): Use gcc_assert.

	* varasm.c (get_section): Use gcc_assert.
cp:
	* method.c (make_thunk): Don't set comdat_linkage here.
	(use_thunk): Make thunk one only here, if thunk target is
	DECL_ONE_ONLY.
testsuite:
	* g++.dg/abi/thunk3.C: New.
	* g++.dg/abi/thunk4.C: New.

From-SVN: r109149