Fix build in ILWIS driver

git-svn-id: https://svn.osgeo.org/gdal/trunk/gdal@27979 f0d54148-0727-0410-94bb-9a71ac55c965
Same fix in SAGA

git-svn-id: https://svn.osgeo.org/gdal/trunk/gdal@27980 f0d54148-0727-0410-94bb-9a71ac55c965