Raycaster: Check that line.geometry is instanceof Geometry. Fixes #3779.

src/core/Raycaster.js

@@ -289,6 +289,10 @@
 			inverseMatrix.getInverse( object.matrixWorld );
 			localRay.copy( raycaster.ray ).applyMatrix4( inverseMatrix );
 
+			/* if ( geometry instanceof THREE.BufferGeometry ) {
+
+			} else */ if ( geometry instanceof THREE.Geometry ) {
+
 				var vertices = geometry.vertices;
 				var nbVertices = vertices.length;
 				var interSegment = new THREE.Vector3();
@@ -321,6 +325,8 @@
 
 			}
 
+		}
+
 	};
 
 	var intersectDescendants = function ( object, raycaster, intersects ) {