Empty/Blank WIdget Title

Hi,

Any suggestions on how to avoid styling a blank or empty widget title?

Is there a way to add something like this (except that works)?

if ( function_exists('register_sidebar') )
register_sidebar(array(
	'name' => 'sidebar',
	'before_widget' => '<div class="rightBox">',
	'after_widget' => '</div>',
	if ( !empty($title)
		'before_title' => '<h2>',
		'after_title' => '</h2>',
	)
));

Many thanks!