git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8774 c06c8d41-db1a-0410-9941-cceddc491573
4FJTZNKO5X5K7O2PWMEQT3YJG22CVDPNIOTRV65XLZQROHFR3RRQC
VSXFXNKXKVVHNDE3IRQQLT5NZJNVYFZI5634RO6GZE35UFFKHIPAC
PSCYVKJ7DGXAL3V5U4O6AJTRV6Q3N3SHQWAZ73VIPRTE4W64F2XAC
SDLKLUNFGVKDS55DDJZCBAVIB7NL3RRYPTACAY65SCUQKV6APFSAC
&& grid_is_water(feature)
&& !grid_is_water(feature)