Pass config as array when calling parent method.
Pass config as array when calling parent method.

This was detected by a failing test in Travis, funnily browsers
didn't bother at all AFAICT.

geographika/geoext2,marcjansen/geoext2,m-click/geoext2,geographika/geoext2,annarieger/geoext2,geoext/geoext2,marcjansen/geoext2,annarieger/geoext2,bentrm/geoext2,m-click/geoext2,chrismayer/geoext2,bentrm/geoext2,geoext/geoext2,chrismayer/geoext2