git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@9007 c06c8d41-db1a-0410-9941-cceddc491573
LGVFUQTRLQYPWTE2H3ZZL3RNNC56BXV62GEKPNM2V5D3EZBIWL2QC
WNK3YLDUHTTMS5UVOK4WQEFWCILFCPFMZLHIWTBZRP7J2VP67LBAC
K2CS6TCX2NDVL2ASEHGP4J4K4IJ6FP3ANNKTSIWVG43HPYSBX6ZQC
if (mg.level_type == LEVEL_ABYSS && one_chance_in(16))
if (mg.level_type == LEVEL_ABYSS && one_chance_in(7))