c----------------------------------------------------------------------
	subroutine DENSDER(errlap)
c fills the density derivatives in, using logarithmic
c derivatives
c
c author: Kieron Burke, 8.14.99
c     in: dl(0:n) - log of density
c    out: grad(0:n),d2(0:n),lap(0:n),errlap
c  calls: RDFF
	include 'basics.inc'
	include 'dens.inc'
	dimension dum(0:m),dld(0:m),dld2(0:m)