git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@2414 c06c8d41-db1a-0410-9941-cceddc491573
WPNEMEQTXQJSRBHON2ZRNNRWLT4PG5ZR6SFR7OTUIK53ZAXUDSIQC
BFIEDGHSMI5CKOOFWYYB3XHPCZOWPERTBIA5U2HMRSCNWHE57VDQC
K2CS6TCX2NDVL2ASEHGP4J4K4IJ6FP3ANNKTSIWVG43HPYSBX6ZQC
: base(num), add((num + 1) / 2 + 1), rolls(1)
: base(num), add(num == 0? 0 : (num + 1) / 2 + 1), rolls(1)