hentaihaven fix

src/providers/hentaihaven.rs

@@ -201,7 +201,12 @@ impl HentaihavenProvider {
         let block = match html
             .split("previouspostslink")
             .next()
-            .and_then(|s| s.split("vraven_manga_list").nth(1))
+            .and_then(|s| {
+                s.split("vraven_manga_list").nth(1).or_else(|| {
+                    s.find(r#"<div class="page-content-listing item-big_thumbnail">"#)
+                        .map(|idx| &s[idx..])
+                })
+            })
         {
             Some(b) => b,
             None => {