[fractal] Apply suggestion to fractal-gtk/src/appop/directory.rs

[Daniel Garcia Moreno <danigm src gnome org>]

commit 954ef2d4aa57dea61b735a4fd7d2580bddbe0516
Author: Alejandro Domínguez <adomu net-c com>
Date:   Tue Jun 23 05:36:58 2020 +0000

    Apply suggestion to fractal-gtk/src/appop/directory.rs

 fractal-gtk/src/appop/directory.rs | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/fractal-gtk/src/appop/directory.rs b/fractal-gtk/src/appop/directory.rs
index 3a74492c..50c647a5 100644
--- a/fractal-gtk/src/appop/directory.rs
+++ b/fractal-gtk/src/appop/directory.rs
@@ -136,6 +136,11 @@ impl AppOp {
         }
 
         let search_term = q.get_text().unwrap().to_string();
+        if let RoomSearchPagination::NoMorePages = self.directory_pagination {
+            // there are no more rooms. We don't need to request for more
+            return;
+        }
+
         let rooms_since = self.directory_pagination.clone().into();
         let tx = self.backend.clone();
         thread::spawn(move || {