[seahorse] KeyManagerStore: revert condition in get_iter()

[Niels De Graef <nielsdg src gnome org>]

commit d478872364b9c64f13bc8a47c4f73495f2fb620d
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Tue Mar 6 22:30:27 2018 +0100

    KeyManagerStore: revert condition in get_iter()
    
    This is obviously a stupid mistake on my part. Sorry everyone!

 common/key-manager-store.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/common/key-manager-store.vala b/common/key-manager-store.vala
index 9f216e2..0fe17c3 100644
--- a/common/key-manager-store.vala
+++ b/common/key-manager-store.vala
@@ -436,7 +436,7 @@ public class Seahorse.KeyManagerStore : Gcr.CollectionModel {
 
     public static GLib.Object? get_object_from_path (Gtk.TreeView view, Gtk.TreePath? path) {
         Gtk.TreeIter? iter;
-        if (view.model.get_iter (out iter, path))
+        if (!view.model.get_iter (out iter, path))
             return null;
         return ((Gcr.CollectionModel) view.model).object_for_iter(iter);
     }