[libgovirt] Don't use g_return_val_if_fail in void function

[Christophe Fergeau <teuf src gnome org>]

commit dda4f701183a3a12bd267e69a82cf99f300e9a75
Author: Christophe Fergeau <cfergeau redhat com>
Date:   Fri Jun 27 19:10:09 2014 +0200

    Don't use g_return_val_if_fail in void function

 govirt/ovirt-resource.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/govirt/ovirt-resource.c b/govirt/ovirt-resource.c
index 0d4d897..f01bd20 100644
--- a/govirt/ovirt-resource.c
+++ b/govirt/ovirt-resource.c
@@ -934,7 +934,7 @@ void ovirt_resource_add_rest_params(OvirtResource *resource,
 {
     OvirtResourceClass *klass;
 
-    g_return_val_if_fail(OVIRT_IS_RESOURCE(resource), NULL);
+    g_return_if_fail(OVIRT_IS_RESOURCE(resource));
     g_return_if_fail(OVIRT_IS_RESOURCE_REST_CALL(call));
 
     klass = OVIRT_RESOURCE_GET_CLASS(resource);