succeed, but give you 0 HP, so make them give a minimum of 1 HP.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@9430 c06c8d41-db1a-0410-9941-cceddc491573
2VDJ6NKLLQPLEIJDHZJSPY3XBCAQ7O37RJSLOEKUQGREBX5PRVOAC
KNPYFBNK3GESOQDGE2HH2EMUBQQIHUFYL6RQW2EFHCN2O2UGWDKAC
K2CS6TCX2NDVL2ASEHGP4J4K4IJ6FP3ANNKTSIWVG43HPYSBX6ZQC
hp_gain /= 2;
hp_gain = hp_gain / 2 + 1;
inc_hp(inflicted / 2, false);
inc_hp(inflicted / 2 + 1, false);