#1238: Filter out null features as the MVT format driver can return null items in its feature array
#1238: Filter out null features as the MVT format driver can return null items in its feature array

jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout