Allow zooming while rotating (#8634)

examples/js/controls/OrbitControls.js

@@ -756,7 +756,7 @@ THREE.OrbitControls = function ( object, domElement ) {
 
 	function onMouseWheel( event ) {
 
-		if ( scope.enabled === false || scope.enableZoom === false || state !== STATE.NONE ) return;
+		if ( scope.enabled === false || scope.enableZoom === false || ( state !== STATE.NONE && state !== STATE.ROTATE ) ) return;
 
 		event.preventDefault();
 		event.stopPropagation();