Legend.getStyleImage() fails to render "Multi" GeometryTypes

[richard-thomas]

ol/Layer/Vector features of GeometryType Multi* are not rendered in Legends. However, a simple addition of the 3 missing types in Legend.js seems to solve the problem:

          switch (typeGeom) {
            case ol_geom_Point:
            case 'Point':
            case 'MultiPoint': // ADDED
              vectorContext.drawGeometry(new ol_geom_Point([cx, cy]));
              break;
            case ol_geom_LineString:
            case 'LineString':
            case 'MultiLineString': // ADDED
              ctx.save();
                ctx.rect(legend.get('margin') * ratio, 0, size[0] *  ratio, canvas.height);
                ctx.clip();
                vectorContext.drawGeometry(new ol_geom_LineString([[cx-sx, cy], [cx+sx, cy]]));
              ctx.restore();
              break;
            case ol_geom_Polygon:
            case 'Polygon':
            case 'MultiPolygon': // ADDED
              vectorContext.drawGeometry(new ol_geom_Polygon([[[cx-sx, cy-sy], [cx+sx, cy-sy], [cx+sx, cy+sy], [cx-sx, cy+sy], [cx-sx, cy-sy]]]));
              break;
          }

(Alternatively any "Multi" prefix can be stripped from a GeometryType at an earlier point).