Projector: Fixed non-indexed BufferGeometry handling.

src/core/Projector.js

@@ -311,7 +311,7 @@ THREE.Projector = function () {
 
 						} else {
 
-							for ( var i = 0, l = positions.length; i < l; i += 3 ) {
+							for ( var i = 0, l = positions.length / 3; i < l; i += 3 ) {
 
 								renderState.handleTriangle( i, i + 1, i + 2 );