[tracker/tracker-3.0: 1/2] tracker-notifier: Fix tracker_notifier_signal_subscribe annotation

[Sam Thursfield <sthursfield src gnome org>]

commit 0af5ad21b881a3eba2d722640070652b96baccef
Author: Jean Felder <jfelder src gnome org>
Date:   Thu Nov 12 13:57:36 2020 +0100

    tracker-notifier: Fix tracker_notifier_signal_subscribe annotation

 src/libtracker-sparql/tracker-notifier.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/libtracker-sparql/tracker-notifier.c b/src/libtracker-sparql/tracker-notifier.c
index 80f5867f4..9ee9ec3f4 100644
--- a/src/libtracker-sparql/tracker-notifier.c
+++ b/src/libtracker-sparql/tracker-notifier.c
@@ -762,8 +762,8 @@ tracker_notifier_init (TrackerNotifier *notifier)
  * @notifier: a #TrackerNotifier
  * @connection: a #GDBusConnection
  * @service: DBus service name to subscribe to events for
- * @object_path: DBus object path to subscribe to events for, or %NULL
- * @graph: graph to listen events for, or %NULL
+ * @object_path: (nullable): DBus object path to subscribe to events for, or %NULL
+ * @graph: (nullable): graph to listen events for, or %NULL
  *
  * Listens to notification events from a remote SPARQL endpoint as a DBus
  * service (see #TrackerEndpointDBus). If the @object_path argument is