(svn r12749) -Codechange: store the viewport information in the windows that have a viewport instead of one global array with a viewport for each window, even when they do not use the viewport.

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