[glib: 1/2] gdbusconnection: Clarify nullability of SignalInstance.sender

[Sebastian Dröge <sdroege src gnome org>]

commit 5a74c2f445458c037aa71ac51de3ed6af325a1ab
Author: Philip Withnall <withnall endlessm com>
Date:   Fri Apr 3 12:16:49 2020 +0100

    gdbusconnection: Clarify nullability of SignalInstance.sender
    
    Following on from !1425.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>

 gio/gdbusconnection.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/gio/gdbusconnection.c b/gio/gdbusconnection.c
index 1a4dae3bd..54aaf43d9 100644
--- a/gio/gdbusconnection.c
+++ b/gio/gdbusconnection.c
@@ -3728,7 +3728,7 @@ typedef struct
   SignalSubscriber    *subscriber;  /* (owned) */
   GDBusMessage        *message;
   GDBusConnection     *connection;
-  const gchar         *sender;
+  const gchar         *sender;  /* (nullable) for peer-to-peer connections */
   const gchar         *path;
   const gchar         *interface;
   const gchar         *member;
@@ -3833,7 +3833,9 @@ path_rule_matches (const gchar *path_a,
   return memcmp (path_a, path_b, MIN (len_a, len_b)) == 0;
 }
 
-/* called in GDBusWorker thread WITH lock held */
+/* called in GDBusWorker thread WITH lock held
+ *
+ * @sender is (nullable) for peer-to-peer connections */
 static void
 schedule_callbacks (GDBusConnection *connection,
                     GPtrArray       *signal_data_array,