Call to theme_add_style in views_bonus_summary_combo

Fatal error: Call to undefined function theme_add_style() in /home/cl0udy/public_html/gemstudent/sites/all/modules/views_bonus/views_bonus_summary_combo.module on line 68

Line 68

  theme_add_style(drupal_get_path('module', 'views_bonus') .'/views_bonus.css');

should be

   drupal_add_css(drupal_get_path('module', 'views_bonus_summary_combo') .'/views_bonus.css');