Much like everything else in midnam, it's not specified whether the numbers are
0 or 1 relative, but everything out there seems to be 0 relative and this
matches the canvas, so go with that.
... and voila, decent data. Good grief, what a mess that was.
git-svn-id: svn://localhost/ardour2/branches/3.0@13887 d708f5d6-7413-0410-9779-e7cbd77b26cf
