[calls] application: Chain up shutdown

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit edfb4455f8f100da9d2d49161540592321ea94b4
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Wed Dec 1 14:26:58 2021 +0100

    application: Chain up shutdown

 src/calls-application.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/calls-application.c b/src/calls-application.c
index 4894111b..bc41de40 100644
--- a/src/calls-application.c
+++ b/src/calls-application.c
@@ -453,6 +453,8 @@ static void
 app_shutdown (GApplication *application)
 {
   cui_uninit ();
+
+  G_APPLICATION_CLASS (calls_application_parent_class)->shutdown (application);
 }