Fixed wrong check for reveal css-top property.

diff --git a/js/foundation/foundation.reveal.js b/js/foundation/foundation.reveal.js
index 8f022a6e53206025717dedcf12e410c8158775d0..45c7237685050f5db7c7fbe6a5de9b599e439d16 100644 (file)
--- a/js/foundation/foundation.reveal.js
+++ b/js/foundation/foundation.reveal.js
@@ -90,7 +90,7 @@
 
       var open_modal = $('.reveal-modal.open');
 
-      if (!modal.data('css-top')) {
+      if (typeof modal.data('css-top') === 'undefined') {
         modal.data('css-top', parseInt(modal.css('top'), 10))
           .data('offset', this.cache_offset(modal));
       }