Fix - geometry with TGeoNodeOffset

Basic TGeoPatternX/Y/Z patterns were handled incorrectly

Author: linev

scripts/JSRootGeoBase.js

@@ -1662,7 +1662,7 @@
 
               matrix = new THREE.Matrix4();
 
-              switch (node.fFinder._typename.charAt[node.fFinder._typename.length-1]) {
+              switch (node.fFinder._typename[node.fFinder._typename.length-1]) {
                  case 'X': matrix.setPosition(new THREE.Vector3(_shift, 0, 0)); break;
                  case 'Y': matrix.setPosition(new THREE.Vector3(0, _shift, 0)); break;
                  case 'Z': matrix.setPosition(new THREE.Vector3(0, 0, _shift)); break;