GeoJSON: fix memleak (trunk only)

git-svn-id: https://svn.osgeo.org/gdal/trunk/gdal@26226 f0d54148-0727-0410-94bb-9a71ac55c965
VFK: fix memory leak in VFKDataBlockSQLite::LoadGeometryFromDB()

git-svn-id: https://svn.osgeo.org/gdal/trunk/gdal@26227 f0d54148-0727-0410-94bb-9a71ac55c965