[gobject-introspection] Improve documentation for g_registered_type_info_get_g_type

[Johan Dahlin <johan src gnome org>]

commit 7dc431f1bf4c0a5912f10240f4908c7b77d04316
Author: Johan Dahlin <johan gnome org>
Date:   Wed Oct 6 12:51:44 2010 -0300

    Improve documentation for g_registered_type_info_get_g_type

 girepository/giregisteredtypeinfo.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/girepository/giregisteredtypeinfo.c b/girepository/giregisteredtypeinfo.c
index cc43d28..ca06b9f 100644
--- a/girepository/giregisteredtypeinfo.c
+++ b/girepository/giregisteredtypeinfo.c
@@ -114,7 +114,10 @@ g_registered_type_info_get_type_init (GIRegisteredTypeInfo *info)
  * g_registered_type_info_get_g_type:
  * @info: a #GIRegisteredTypeInfo
  *
- * Obtain the #GType for this registered type.
+ * Obtain the #GType for this registered type or G_TYPE_NONE which a special meaning.
+ * It means that either there is no type information associated with this @info or
+ * that the shared library which provides the type_init function for this
+ * @info cannot be called.
  *
  * Returns: the #GType.
  */