[gthumb] selections: fixed possible crash after reordering the files

[Paolo Bacchilega <paobac src gnome org>]

commit c54b349f6b1d200e637f814612195861241ad80e
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Jun 9 09:52:15 2019 +0200

    selections: fixed possible crash after reordering the files

 extensions/selections/gth-selections-manager.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
---
diff --git a/extensions/selections/gth-selections-manager.c b/extensions/selections/gth-selections-manager.c
index 21423847..e25b0b11 100644
--- a/extensions/selections/gth-selections-manager.c
+++ b/extensions/selections/gth-selections-manager.c
@@ -477,6 +477,20 @@ gth_selections_manager_remove_files (GFile    *folder,
 }
 
 
+static void
+_gth_selections_manager_files_changed_for_selection (GthSelectionsManager *self,
+                                                    int                   n_selection)
+{
+       GList *scan;
+
+       g_hash_table_remove_all (self->priv->files_hash[n_selection - 1]);
+       for (scan = self->priv->files[n_selection - 1]; scan; scan = scan->next) {
+               GFile *file = scan->data;
+               g_hash_table_insert (self->priv->files_hash[n_selection - 1], file, GINT_TO_POINTER (1));
+       }
+}
+
+
 void
 gth_selections_manager_reorder (GFile *folder,
                                GList *visible_files, /* GFile list */
@@ -505,6 +519,7 @@ gth_selections_manager_reorder (GFile *folder,
                         &new_file_list);
        _g_object_list_unref (self->priv->files[n_selection - 1]);
        self->priv->files[n_selection - 1] = new_file_list;
+       _gth_selections_manager_files_changed_for_selection (self, n_selection);
        g_mutex_unlock (&self->priv->mutex);
 
        gth_selections_manager_set_sort_type (folder, "general::unsorted", FALSE);