[calls] ringer: Cancel any ongoing actions on shutdown

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit 8c6d64ddaf6a9be3a25987bcbd43f80e24aa7a87
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Thu Aug 18 21:12:11 2022 +0200

    ringer: Cancel any ongoing actions on shutdown

 src/calls-ringer.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/calls-ringer.c b/src/calls-ringer.c
index ca656257..1bed242f 100644
--- a/src/calls-ringer.c
+++ b/src/calls-ringer.c
@@ -467,6 +467,9 @@ dispose (GObject *object)
 
   g_clear_handle_id (&self->restart_id, g_source_remove);
 
+  g_cancellable_cancel (self->cancel_ring);
+  g_clear_object (&self->cancel_ring);
+
   G_OBJECT_CLASS (calls_ringer_parent_class)->dispose (object);
 }