Fix marker lines can not update with more segments then before (BlueMap-Minecraft/BlueMap#221)

src/markers/ExtrudeMarker.js

@@ -415,6 +415,7 @@ class ExtrudeMarkerBorder extends Line2 {
      * @param shape {Shape}
      */
     updateGeometry(shape) {
+        this.geometry = new LineSegmentsGeometry();
         this.geometry.setPositions(ExtrudeMarkerBorder.createLinePoints(shape));
         this.computeLineDistances();
     }

src/markers/LineMarker.js

@@ -276,6 +276,7 @@ class LineMarkerLine extends Line2 {
      * @param points {number[]}
      */
     updateGeometry(points) {
+        this.geometry = new LineGeometry();
         this.geometry.setPositions(points);
         this.computeLineDistances();
     }

src/markers/ShapeMarker.js

@@ -408,6 +408,7 @@ class ShapeMarkerBorder extends Line2 {
      * @param shape {Shape}
      */
     updateGeometry(shape) {
+        this.geometry = new LineGeometry();
         this.geometry.setPositions(ShapeMarkerBorder.createLinePoints(shape));
         this.computeLineDistances();
     }