at: update to 3.1.20.

srcpkgs/at/template

@@ -1,8 +1,7 @@
 # Template file for 'at'
 pkgname=at
-version=3.1.18
+version=3.1.20
 revision=1
-create_wrksrc=yes
 build_style=gnu-configure
 configure_args="--with-jobdir=/var/spool/atd --with-atspool=/var/spool/atd
  --sbindir=/usr/bin --with-daemon_username=at --with-daemon_groupname=at
@@ -20,7 +19,7 @@ maintainer="Christian Neukirchen <chneukirchen@gmail.com>"
 license="GPL-2"
 homepage="http://packages.qa.debian.org/a/at.html"
 distfiles="${DEBIAN_SITE}/main/a/${pkgname}/${pkgname}_${version}.orig.tar.gz"
-checksum=dbd5c8cb8edd53ef467363c3af0391c08769f1dbbd4d5002c59a4cd4cac11d52
+checksum=0871923cab73050b98ace020664eb2ddc1e669e4166b5abb64d864d02fcefab9
 
 do_install() {
 	sed -i '/chown/d' Makefile