Fix return value on error.

diff --git a/gst-libs/gst/vaapi/gstvaapiobject.c b/gst-libs/gst/vaapi/gstvaapiobject.c
index 3e844c7..8d13c67 100644 (file)
--- a/gst-libs/gst/vaapi/gstvaapiobject.c
+++ b/gst-libs/gst/vaapi/gstvaapiobject.c
@@ -220,7 +220,7 @@ gst_vaapi_object_get_display(GstVaapiObject *object)
 GstVaapiID
 gst_vaapi_object_get_id(GstVaapiObject *object)
 {
-    g_return_val_if_fail(GST_VAAPI_IS_OBJECT(object), NULL);
+    g_return_val_if_fail(GST_VAAPI_IS_OBJECT(object), VA_INVALID_ID);
 
     return object->priv->id;
 }