fix catch-links when no href

Author: mmckegg

lib/catch-links.js

@@ -16,15 +16,14 @@ module.exports = function (root, cb) {
 
     let href = anchor.getAttribute('href')
 
-    if (href.startsWith('#')) {
-      try {
-        href = decodeURIComponent(href)
-      } catch (e) {
-        // Safely ignore error because href isn't URI-encoded.
-      }
-    }
-
     if (href) {
+      if (href.startsWith('#')) {
+        try {
+          href = decodeURIComponent(href)
+        } catch (e) {
+          // Safely ignore error because href isn't URI-encoded.
+        }
+      }
       let isUrl
       let url