* genmodes.c (calc_wider_mode): Suppress qsort macro.
	* system.h [CHECKING_P] (qsort): Redirect to qsort_chk.
	(qsort_chk): Declare.
	* vec.c [CHECKING_P] (qsort_chk_error): New static function.
	(qsort_chk): New function.

From-SVN: r253295