[glib/glib-2-28] GDBusMethodInvocation: Improve get_parameters() documentation.

[Murray Cumming <murrayc src gnome org>]

commit cdeb2dbd475c2220b832b8165b1a3fabd2ec3acf
Author: Murray Cumming <murrayc murrayc com>
Date:   Sat Apr 2 15:42:11 2011 +0200

    GDBusMethodInvocation: Improve get_parameters() documentation.
    
    Note that the returned GVariant is always a tuple.
    See bug #646420.

 gio/gdbusmethodinvocation.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/gio/gdbusmethodinvocation.c b/gio/gdbusmethodinvocation.c
index 2e6b5e6..64b7486 100644
--- a/gio/gdbusmethodinvocation.c
+++ b/gio/gdbusmethodinvocation.c
@@ -249,9 +249,10 @@ g_dbus_method_invocation_get_message (GDBusMethodInvocation *invocation)
  * g_dbus_method_invocation_get_parameters:
  * @invocation: A #GDBusMethodInvocation.
  *
- * Gets the parameters of the method invocation.
+ * Gets the parameters of the method invocation. If there are no input
+ * parameters then this will return a GVariant with 0 children rather than NULL.
  *
- * Returns: A #GVariant. Do not free, it is owned by @invocation.
+ * Returns: (transfer none): A #GVariant tuple. Do not unref this because it is owned by @invocation.
  *
  * Since: 2.26
  */