#2619, SIGSEGV in ST_GeomFromGeoJSON with empty list of coordinates


git-svn-id: http://svn.osgeo.org/postgis/trunk@12355 b70326c6-7e19-0410-871a-916f4a2858ee
Fix up GeoJSON empty poly fix a little more


git-svn-id: http://svn.osgeo.org/postgis/trunk@12356 b70326c6-7e19-0410-871a-916f4a2858ee