[Plugin: Custom menu images] Put generated styles inside the head tag

Hi, I’ve changed some functions of this great plugin.

these are my changes:

function get_custom_menu_image_css($menuItems, $args){
		$custom_options = (get_option($this->prefix));
		foreach ($menuItems as $key => $val ) {
			$menuItems[$key]->classes = array('menu_item_'.$val->ID);
			$image_url = ($custom_options[$val->ID]['url_type'] != 'lib' ? $custom_options[$val->ID]['url'] : $custom_options[$val->ID]['media_lib']);
			if($image_url != '') {
                            $this->styles[] = 'li.menu-item.menu_item_'.$val->ID.' a{ background-image: url('.$image_url.'); } ';
                        }
		}

                if($this->styles[0] != '<style>')
                    array_unshift($this->styles, '<style>');
                else
                    if(end($this->styles) != '</style>')
                        $this->styles[] = '</style>';

		return $menuItems;
	}

function print_custom_menu_image_css(){
    $new_styles = "";
    foreach ($this->styles as $line){
        $new_styles .= $line;
    }
    ?>
    <script type="text/javascript">
    //<!--
        jQuery(document).ready(function(){
            jQuery("head").append("<?php echo $new_styles; ?>");
        });
    //-->
    </script>;
    <?php
}