Little bug when disabling “revote”

hi i noticed that if you set vote to “Single vote only” instead of “with revote” a variable isn’t defined:

Notice	Undefined variable: _remaining
wp-content/plugins/gd-rating-system/methods/stars-rating/render.php:96
Plugin: gd-rating-system

gdrts_render_rating()
wp-content/plugins/gd-rating-system/rating/base.expanded.php:42
gdrts_engine_single->render()
wp-content/plugins/gd-rating-system/rating/base.functions.php:6
gdrts_core->render_template()
wp-content/plugins/gd-rating-system/rating/engine.single.php:75
gdrts_render_single_stars_rating->vote_from_user()
wp-content/plugins/gd-rating-system/templates/gdrts--stars-rating--single--default.php:52

Thanks.