re PR c/70859 (Bad column number in type-generic function errors)

re PR c/70859 (Bad column number in type-generic function errors)

	PR c/70859
	* input.c (expansion_point_location): New function.
	* input.h (expansion_point_location): Declare.

	* c-common.c (builtin_function_validate_nargs): Add location
	parameter.  Use it.
	(check_builtin_function_arguments): Add location and arguments
	parameters.  Use them.
	* c-common.h (check_builtin_function_arguments): Update declaration.

	* c-typeck.c (build_function_call_vec): Pass LOC and ARG_LOC down to
	check_builtin_function_arguments.

	* call.c (build_cxx_call): Pass location and vNULL down to
	check_builtin_function_arguments.

	* gcc.dg/pr70859.c: New test.
	* gcc.dg/pr70859-2.c: New test.

From-SVN: r235832