PG: change "No field definitions found" from fatal error to debug
    http://lists.osgeo.org/pipermail/gdal-dev/2014-May/039154.html


git-svn-id: https://svn.osgeo.org/gdal/trunk@27369 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_with_coverage