[gnome-online-accounts] oauth2: Silence -Wint-conversion

[Debarshi Ray <debarshir src gnome org>]

commit 47df3ef3c5e45557414346fcffddd27aaabd8689
Author: Debarshi Ray <debarshir gnome org>
Date:   Tue Oct 27 18:23:51 2015 +0100

    oauth2: Silence -Wint-conversion

 src/goabackend/goaoauth2provider.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/goabackend/goaoauth2provider.c b/src/goabackend/goaoauth2provider.c
index 500fc5a..db086da 100644
--- a/src/goabackend/goaoauth2provider.c
+++ b/src/goabackend/goaoauth2provider.c
@@ -309,9 +309,9 @@ goa_oauth2_provider_process_redirect_url (GoaOAuth2Provider  *provider,
                                           gchar             **authorization_code,
                                           GError            **error)
 {
-  g_return_val_if_fail (GOA_IS_OAUTH2_PROVIDER (provider), NULL);
-  g_return_val_if_fail (redirect_url != NULL, NULL);
-  g_return_val_if_fail (authorization_code != NULL, NULL);
+  g_return_val_if_fail (GOA_IS_OAUTH2_PROVIDER (provider), FALSE);
+  g_return_val_if_fail (redirect_url != NULL, FALSE);
+  g_return_val_if_fail (authorization_code != NULL, FALSE);
   g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
 
   return GOA_OAUTH2_PROVIDER_GET_CLASS (provider)->process_redirect_url (provider,