[libglnx] autocleanups: Fix g_autoptr(GString) with glib 2.44

[Alexander Larsson <alexl src gnome org>]

commit e7f7081054311670411b8ad34f144c99822538c1
Author: Alexander Larsson <alexl redhat com>
Date:   Thu Dec 17 13:29:08 2015 +0100

    autocleanups: Fix g_autoptr(GString) with glib 2.44
    
    The g_autoptr support for GString was added in 2.45.8, so we need
    to define it on 2.44 for it to work.

 glnx-backport-autocleanups.h |   21 +++++++++++++--------
 1 files changed, 13 insertions(+), 8 deletions(-)
---
diff --git a/glnx-backport-autocleanups.h b/glnx-backport-autocleanups.h
index 53f7ffd..9e90fa8 100644
--- a/glnx-backport-autocleanups.h
+++ b/glnx-backport-autocleanups.h
@@ -31,13 +31,6 @@ g_autoptr_cleanup_generic_gfree (void *p)
     g_free (*pp);
 }
 
-static inline void
-g_autoptr_cleanup_gstring_free (GString *string)
-{
-  if (string)
-    g_string_free (string, TRUE);
-}
-
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GAsyncQueue, g_async_queue_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GBookmarkFile, g_bookmark_file_free)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GBytes, g_bytes_unref)
@@ -55,7 +48,6 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC(GPtrArray, g_ptr_array_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GMainContext, g_main_context_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GMainLoop, g_main_loop_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GSource, g_source_unref)
-G_DEFINE_AUTOPTR_CLEANUP_FUNC(GString, g_autoptr_cleanup_gstring_free)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GMappedFile, g_mapped_file_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GMarkupParseContext, g_markup_parse_context_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(gchar, g_free)
@@ -115,3 +107,16 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC(GDBusConnection, g_object_unref)
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GDBusMessage, g_object_unref)
 
 #endif
+
+#if !GLIB_CHECK_VERSION(2, 45, 8)
+
+static inline void
+g_autoptr_cleanup_gstring_free (GString *string)
+{
+  if (string)
+    g_string_free (string, TRUE);
+}
+
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(GString, g_autoptr_cleanup_gstring_free)
+
+#endif