Hentaifoundry ripper no long throws a null error when getting the next page; No longer makes unneeded requests

src/main/java/com/rarchives/ripme/ripper/rippers/HentaifoundryRipper.java

@@ -74,12 +74,16 @@ public class HentaifoundryRipper extends AbstractHTMLRipper {
         }
         Elements els = doc.select("li.next > a");
         Element first = els.first();
+        try {
             String nextURL = first.attr("href");
             nextURL = "http://www.hentai-foundry.com" + nextURL;
             return Http.url(nextURL)
                     .referrer(url)
                     .cookies(cookies)
                     .get();
+        } catch (NullPointerException e) {
+            throw new IOException("No more pages");
+        }
     }
 
     @Override