[gnome-todo] sidebar: Be resilient against NULL rows

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit cc7277f1e173a5f3f79f0dd61d4152156524189a
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sat Jul 20 19:02:20 2019 -0300

    sidebar: Be resilient against NULL rows
    
    Instead of asserting for non-NULL list rows, which
    is something we can eventually need to deal with,
    handle it gracefully with an early return.

 src/sidebar/gtd-sidebar.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/sidebar/gtd-sidebar.c b/src/sidebar/gtd-sidebar.c
index 8aec016..dcc0f4d 100644
--- a/src/sidebar/gtd-sidebar.c
+++ b/src/sidebar/gtd-sidebar.c
@@ -525,7 +525,8 @@ on_task_list_removed_cb (GtdManager  *manager,
     listbox = self->archive_listbox;
 
   row = get_row_for_task_list (self, listbox, list);
-  g_assert (row != NULL);
+  if (!row)
+    return;
 
   gtk_widget_destroy (GTK_WIDGET (row));
   gtk_list_box_invalidate_filter (listbox);