RFC41: make sure ogr2ogr set the SRS of the first geometry when converting from a layer supporting muliple geometry fields to a target layer supporting only one

git-svn-id: https://svn.osgeo.org/gdal/trunk@26490 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_travis_macosx