[gobject-introspection] Update glib annotations from glib 2.45.1

[Rico Tzschichholz <ricotz src gnome org>]

commit 3661f9336f9a7ad67a26c2d4bcd37deac5c711ce
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri May 1 14:58:58 2015 +0200

    Update glib annotations from glib 2.45.1

 gir/gio-2.0.c     |    2 +-
 gir/glib-2.0.c    |    5 +++--
 gir/gobject-2.0.c |    4 +++-
 3 files changed, 7 insertions(+), 4 deletions(-)
---
diff --git a/gir/gio-2.0.c b/gir/gio-2.0.c
index a2ebe72..ec34e62 100644
--- a/gir/gio-2.0.c
+++ b/gir/gio-2.0.c
@@ -33714,7 +33714,7 @@
  * This can be useful if you want to do something unusual on it
  * not supported by the #GSocketConnection APIs.
  *
- * Returns: (transfer none): a #GSocketAddress or %NULL on error.
+ * Returns: (transfer none): a #GSocket or %NULL on error.
  * Since: 2.22
  */
 
diff --git a/gir/glib-2.0.c b/gir/glib-2.0.c
index 406e140..785ae14 100644
--- a/gir/glib-2.0.c
+++ b/gir/glib-2.0.c
@@ -34778,7 +34778,8 @@
  * with empty arrays).
  *
  * In the event that the parsing is successful, the resulting #GVariant
- * is returned.
+ * is returned. It is never floating, and must be freed with
+ * g_variant_unref().
  *
  * In case of any error, %NULL will be returned.  If @error is non-%NULL
  * then it will be set to reflect the error that occurred.
@@ -34786,7 +34787,7 @@
  * Officially, the language understood by the parser is "any string
  * produced by g_variant_print()".
  *
- * Returns: a reference to a #GVariant, or %NULL
+ * Returns: a non-floating reference to a #GVariant, or %NULL
  */
 
 
diff --git a/gir/gobject-2.0.c b/gir/gobject-2.0.c
index 440d0c2..afbc2d2 100644
--- a/gir/gobject-2.0.c
+++ b/gir/gobject-2.0.c
@@ -4355,7 +4355,9 @@
  *  is being emitted on. The rest are any arguments to be passed to the signal.
  * @signal_id: the signal id
  * @detail: the detail
- * @return_value: Location to store the return value of the signal emission.
+ * @return_value: (inout) (optional): Location to
+ * store the return value of the signal emission. This must be provided if the
+ * specified signal returns a value, but may be ignored otherwise.
  *
  * Emits a signal.
  *