tridiag()

subroutine module_bl_mynn::tridiag	(	integer, intent(in)	n,
		real(kind_phys), dimension(n), intent(in)	a,
		real(kind_phys), dimension(n), intent(in)	b,
		real(kind_phys), dimension(n), intent(inout)	c,
		real(kind_phys), dimension(n), intent(inout)	d )