HousenumberGenerator: use same correction as in r3391 for Coord.shortestDistToLineSegment  

Effect of the error: Some house numbers were added to the 
wrong sides of the street or a wrong part. E.g. when the
road contains a 90 degree turn 




git-svn-id: http://svn.mkgmap.org.uk/mkgmap/trunk@3392 25d90789-57f7-4ee0-8453-03a3dfeeeb22