[gnome-online-accounts] providerfactory: Style fix

[Debarshi Ray <debarshir src gnome org>]

commit dc4501e857651b4b531e6778000096a82c239472
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed Jan 4 16:42:08 2017 +0100

    providerfactory: Style fix
    
    Let's move the assertion to the public wrapper so that each
    implementations doesn't need to have it.

 src/goabackend/goaproviderfactory.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/src/goabackend/goaproviderfactory.c b/src/goabackend/goaproviderfactory.c
index 02bb892..476940f 100644
--- a/src/goabackend/goaproviderfactory.c
+++ b/src/goabackend/goaproviderfactory.c
@@ -114,6 +114,7 @@ goa_provider_factory_get_providers_finish (GoaProviderFactory  *factory,
 
   g_return_val_if_fail (GOA_IS_PROVIDER_FACTORY (factory), FALSE);
   g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
 
   klass = GOA_PROVIDER_FACTORY_GET_CLASS (factory);
   return klass->get_providers_finish (factory, out_providers, result, error);
@@ -129,8 +130,6 @@ get_providers_finish_default (GoaProviderFactory  *factory,
   GList *providers;
   gboolean had_error;
 
-  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
-
   g_return_val_if_fail (g_task_is_valid (result, factory), FALSE);
   task = G_TASK (result);