JS: Skip link when "href" attribute is not present

Signed-off-by: Juraj Oravec <jurajoravec@mailo.com>

rssfinder/finder.js

@@ -25,6 +25,7 @@ for (link of links) {
             linkTitle = siteTitle;
         }
 
+        if (link.hasAttribute('href') == true) {
             if (link.getAttribute('href').startsWith('/')) {
                 linkUrl = window.location.protocol + '//' + window.location.hostname + link.getAttribute('href');
             } else if (!link.getAttribute('href').includes('/')) {
@@ -38,6 +39,7 @@ for (link of links) {
                 url: linkUrl
             });
         }
+    }
 }
 
 if (availableLinks.length == 0) {