[gnome-online-accounts] provider: Fix GoaProviderFactory leak

[Debarshi Ray <debarshir src gnome org>]

commit 2cc982bcdae36bd5604619740af5411899b987df
Author: Christophe Fergeau <cfergeau redhat com>
Date:   Thu Jul 30 21:41:09 2015 +0200

    provider: Fix GoaProviderFactory leak
    
    This fixes:
    
    ==23326== 24 bytes in 1 blocks are definitely lost in loss record 5,177 of 18,672
    ==23326==    at 0x4C28C50: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
    ==23326==    by 0x1445EFCC: g_malloc (gmem.c:94)
    ==23326==    by 0x14477523: g_slice_alloc (gslice.c:1007)
    ==23326==    by 0x14477563: g_slice_alloc0 (gslice.c:1032)
    ==23326==    by 0x141E0A30: g_type_create_instance (gtype.c:1852)
    ==23326==    by 0x141C7E85: g_object_new_internal (gobject.c:1779)
    ==23326==    by 0x141C8394: g_object_newv (gobject.c:1926)
    ==23326==    by 0x141C7A36: g_object_new (gobject.c:1619)
    ==23326==    by 0x5BB0770: goa_provider_get_all (goaprovider.c:1219)
    ==23326==    by 0x49BB34: add_account (cc-online-accounts-panel.c:779)
    ==23326==    by 0x49BB78: on_toolbar_add_button_clicked (cc-online-accounts-panel.c:789)
    ==23326==    by 0x141C29ED: g_cclosure_marshal_VOID__VOIDv (gmarshal.c:905)
    ==23326==    by 0x141BFBE3: _g_closure_invoke_va (gclosure.c:864)
    ==23326==    by 0x141DA3E7: g_signal_emit_valist (gsignal.c:3292)
    ==23326==    by 0x141DB6CC: g_signal_emit_by_name (gsignal.c:3479)
    ==23326==    by 0x126687D3: button_clicked (gtktoolbutton.c:944)
    ==23326==    by 0x141C29ED: g_cclosure_marshal_VOID__VOIDv (gmarshal.c:905)
    
    https://bugzilla.gnome.org/show_bug.cgi?id=756759

 src/goabackend/goaprovider.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/src/goabackend/goaprovider.c b/src/goabackend/goaprovider.c
index 5c7d5a6..50f8b07 100644
--- a/src/goabackend/goaprovider.c
+++ b/src/goabackend/goaprovider.c
@@ -1193,8 +1193,11 @@ goa_provider_get_all (GAsyncReadyCallback callback,
   for (l = extensions, i = 0; l != NULL; l = l->next, i++)
     {
       GIOExtension *extension = l->data;
-      goa_provider_factory_get_providers (g_object_new (g_io_extension_get_type (extension), NULL),
-          get_providers_cb, data);
+      GoaProviderFactory *factory;
+
+      factory = GOA_PROVIDER_FACTORY (g_object_new (g_io_extension_get_type (extension), NULL));
+      goa_provider_factory_get_providers (factory, get_providers_cb, data);
+      g_object_unref (factory);
       data->pending_calls++;
     }