(svn r13603) -Feature{newGRF]: Add var 65 in Variational Action 2 Variables for Houses.
This var will return the manhattan distance of the nearest house that match a given criteria.
The criterias can be: 0 : house ID/ 1 : Class ID/ 2 : grf ID
The search radius can be defined too, up to 64.

Makefile*
bin/*
!bin/data/chars.grf
!bin/data/openttdd.grf
!bin/data/openttdw.grf
!bin/data/opntitle.grf
!bin/scenario/README
!bin/scripts*
config.*
objs/*
src/rev.cpp