[calls] ui-call-data: Handle anonymous callers gracefully

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit 79875cb64efde3ff0fbb7137c244a217adc7d76c
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Thu Feb 17 11:51:37 2022 +0100

    ui-call-data: Handle anonymous callers gracefully

 src/calls-ui-call-data.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
---
diff --git a/src/calls-ui-call-data.c b/src/calls-ui-call-data.c
index 70f39b9c..cc6a2a4d 100644
--- a/src/calls-ui-call-data.c
+++ b/src/calls-ui-call-data.c
@@ -144,7 +144,10 @@ calls_ui_call_data_get_avatar_icon (CuiCall *call_data)
 
   g_return_val_if_fail (CALLS_UI_CALL_DATA (self), NULL);
 
-  return calls_best_match_get_avatar (self->best_match);
+  if (self->best_match)
+    return calls_best_match_get_avatar (self->best_match);
+  else
+    return NULL;
 }
 
 
@@ -332,6 +335,9 @@ set_call_data (CallsUiCallData *self,
     calls_contacts_provider_lookup_id (contacts_provider,
                                        calls_call_get_id (call));
 
+  if (!self->best_match)
+    return;
+
   g_signal_connect_object (self->best_match,
                            "notify::name",
                            G_CALLBACK (on_notify_name),