Next and Previous Symbols

I would like to change the default next and previous symbols to the words “next” and “previous”.

I’ve found where this is set lines 65 and 66 of navigation.php:

$prev_symbol = apply_filters('ngg_prev_symbol', '◄');
$next_symbol = apply_filters('ngg_prev_symbol', '►');

Fantastic there’s a filter so no problem changing but I believe there is a typo in the code. Since the filter for both is called “ngg_prev_symbol” I can only change the symbols into the same thing.

I think the code should be:

$prev_symbol = apply_filters('ngg_prev_symbol', '◄');
$next_symbol = apply_filters('ngg_next_symbol', '►');

http://wordpress.org/extend/plugins/nextgen-gallery/