correct JavaDoc, no functional change

git-svn-id: http://svn.mkgmap.org.uk/splitter/trunk@413 838fabe5-b1a8-4b81-9896-7a84386980e9
Allow max aspect ratio of 32 instead of 4 when splitting into few parts.

git-svn-id: http://svn.mkgmap.org.uk/splitter/trunk@414 838fabe5-b1a8-4b81-9896-7a84386980e9