as soon as the area is generated.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5618 c06c8d41-db1a-0410-9941-cceddc491573
EC5OZJDVDPALZKVRZ5QKCIPPISLGKBXOGCQZUTA4QI7QP7IRMHSQC
YF2GZWXNV6NVFFEBEOYS67JQJQK2IUS5BZMGJW3XQPYIJYHQJCEQC
65PB6QZNUDTUKE3I6YJAUXWHJRC3EKC4CPFHE2FRQDQIBN53DUPQC
5BJPWUPLJFS34FUTFJVKA4A52YMIGV6EWDXLNSDCWBJWBGVSQFGQC
K2CS6TCX2NDVL2ASEHGP4J4K4IJ6FP3ANNKTSIWVG43HPYSBX6ZQC
setup_environment_effects();
// Can't re-use ri since you.pos() has changed.