git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@6652 c06c8d41-db1a-0410-9941-cceddc491573
HBABF6EDHS4K7QKQU6NM3L3FDIZN3N345MN4KFGHY7XGTX34TPIQC
5XNQ3SSNBFXFNWA6DPM74W6FH65NX665P3DMH6YCWVFOPZTJSYCQC
K2CS6TCX2NDVL2ASEHGP4J4K4IJ6FP3ANNKTSIWVG43HPYSBX6ZQC
return current.y > bottomright.y;
return !(current.y > bottomright.y);