[calls] manager: Initialize g_auto variable to NULL

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit a85b9cd5c3e21094753ad3d7464b3aa654ea0527
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Wed Aug 25 10:50:52 2021 +0200

    manager: Initialize g_auto variable to NULL

 src/calls-manager.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/calls-manager.c b/src/calls-manager.c
index 2c1045ad..57a609ac 100644
--- a/src/calls-manager.c
+++ b/src/calls-manager.c
@@ -379,7 +379,7 @@ remove_provider (CallsManager *self,
 {
   GListModel *origins;
   guint n_items;
-  g_autoptr (CallsProvider) provider;
+  g_autoptr (CallsProvider) provider = NULL;
 
   g_assert (CALLS_IS_MANAGER (self));
   g_assert (name);