Don't unbind createMaterial in Loader

build/three.js

@@ -11248,7 +11248,7 @@ THREE.Loader.prototype = {
 
 		for ( var i = 0; i < materials.length; ++ i ) {
 
-			array[ i ] = THREE.Loader.prototype.createMaterial( materials[ i ], texturePath );
+			array[ i ] = this.createMaterial( materials[ i ], texturePath );
 
 		}
 

src/loaders/Loader.js

@@ -77,7 +77,7 @@ THREE.Loader.prototype = {
 
 		for ( var i = 0; i < materials.length; ++ i ) {
 
-			array[ i ] = THREE.Loader.prototype.createMaterial( materials[ i ], texturePath );
+			array[ i ] = this.createMaterial( materials[ i ], texturePath );
 
 		}