Make sure we set the height of the string if it doesn't contain any spaces where we could break the line.
Make sure we set the height of the string if it doesn't contain
any spaces where we could break the line.

Patch from Jon Burgess <jburgess777@googlemail.com>.


git-svn-id: 5adfda8227e14e59fd47d5bd9925a30df16fed74@716 d397654b-2ff0-0310-9e29-ba003691a0f9

craigds/mapnik2,makinacorpus/mapnik2,craigds/mapnik2,craigds/mapnik2,makinacorpus/mapnik2,craigds/mapnik2,makinacorpus/mapnik2,makinacorpus/mapnik2