GML/VFR: OGR integers are only 32 bit wide for now , see http://trac.osgeo.org/gdal/wiki/rfc31_ogr_64

git-svn-id: https://svn.osgeo.org/gdal/trunk@27553 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_travis_macosx