Bug Fix: some scenarios where buttons not displaying

Author: codemwnci

lib/codemwnci/markdown-editpreview-ng.js

@@ -47,7 +47,7 @@
       restrict: 'A',
       replace: false,
       link: function(scope, element, attrs) {  
-        var hiddenButtons = attrs.markdownHiddenButtons.split(",");
+        var hiddenButtons = attrs.markdownHiddenButtons ? attrs.markdownHiddenButtons.split(",") : new Array();
         hiddenButtons.push('cmdPreview');
         element.markdown({hiddenButtons: hiddenButtons});        
       },