[calls] call-window: Clear handle id when hiding call window

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit 8f6ca20a2cb73b93143387195bd518bcbe51720a
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Sun Dec 5 16:50:19 2021 +0100

    call-window: Clear handle id when hiding call window
    
    This fixes GLib criticals like
    GLib[464166]:CRITICAL: Source ID 17 was not found when attempting to remove it

 src/calls-call-window.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/calls-call-window.c b/src/calls-call-window.c
index 75994897..1a9677a0 100644
--- a/src/calls-call-window.c
+++ b/src/calls-call-window.c
@@ -95,6 +95,9 @@ on_delayed_window_hide (gpointer user_data)
   gtk_widget_set_visible (GTK_WIDGET (self), FALSE);
 
   gtk_stack_set_visible_child_name (self->main_stack, "calls");
+
+  self->hideout_id = 0;
+
   return G_SOURCE_REMOVE;
 }