Menu click when no mouseover causes error

If you use autocomplete, and have your mouse already in position over where the menu will appear and click without moving it you get an error. Basically trigger the click without triggering the mousover.

The select method in the menu code (jquery.ui.menu.js line 368) does not check that an active item exists and this causes an error in the autocomplete code (jquery.ui.autocomplete.js line 180) when it assumes an item. There are a couple fixes, one is to make the autocomplete code not assume an item and fail gracefully, and the other is to make the menu select the menu item that was clicked if it has no active item. Here is what that might look like if you replaced the menu's select method:

        select: function(event) {
            if (!this.active) {
                this.active = $(event.target).closest(".ui-menu-item");
            }
            // save active reference before closeAll triggers blur            
            var ui = {
                item: this.active
            };
            this.closeAll();
            this._trigger("select", event, ui);
        }

This is against the latest version of the code, and that initial if block is the only new part. It works just as well in the latest released version (1.8.10)