fix invalid entity type in example create_pattern_filled_mpolygon_with_bgcolor()
fix invalid entity type in example create_pattern_filled_mpolygon_with_bgcolor()

Which shows MPOLYGON with pattern fill does not support background color!

mozman/ezdxf,mozman/ezdxf,mozman/ezdxf,mozman/ezdxf,mozman/ezdxf