[gtk+/wip/otte/clipboard: 101/107] tests: Don't crash if widgets go away before clipboard

[Benjamin Otte <otte src gnome org>]

commit ad2d2a6b43c38037c7d30e44f5b53d1a9869be32
Author: Benjamin Otte <otte redhat com>
Date:   Fri Dec 1 06:05:07 2017 +0100

    tests: Don't crash if widgets go away before clipboard
    
    Don't g_signal_connect() to the clipboard without protection - the
    clipboard might outlast you and still emit signals.

 tests/testclipboard2.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/tests/testclipboard2.c b/tests/testclipboard2.c
index abc4751..cd72696 100644
--- a/tests/testclipboard2.c
+++ b/tests/testclipboard2.c
@@ -177,7 +177,7 @@ get_formats_list (GdkClipboard *clipboard)
   sw = gtk_scrolled_window_new (NULL, NULL);
 
   list = gtk_list_box_new ();
-  g_signal_connect (clipboard, "notify::formats", G_CALLBACK (clipboard_formats_change_cb), list);
+  g_signal_connect_object (clipboard, "notify::formats", G_CALLBACK (clipboard_formats_change_cb), list, 0);
   clipboard_formats_change_cb (clipboard, NULL, list);
   gtk_container_add (GTK_CONTAINER (sw), list);
 
@@ -193,7 +193,7 @@ get_contents_widget (GdkClipboard *clipboard)
   gtk_widget_set_hexpand (stack, TRUE);
   gtk_widget_set_vexpand (stack, TRUE);
   g_signal_connect (stack, "notify::visible-child", G_CALLBACK (visible_child_changed_cb), clipboard);
-  g_signal_connect (clipboard, "changed", G_CALLBACK (clipboard_changed_cb), stack);
+  g_signal_connect_object (clipboard, "changed", G_CALLBACK (clipboard_changed_cb), stack, 0);
 
   child = get_formats_list (clipboard);
   gtk_stack_add_titled (GTK_STACK (stack), child, "info", "Info");