[pygobject] Fix memory leak in _pygi_argument_to_array()

[Martin Pitt <martinpitt src gnome org>]

commit 43d356d03d4c83e9de3c56f98a70d387b46f17af
Author: Alban Browaeys <prahal yahoo com>
Date:   Sat Sep 29 01:17:14 2012 +0200

    Fix memory leak in _pygi_argument_to_array()
    
    Length arg and type info need to be unref'ed.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=685082

 gi/pygi-argument.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gi/pygi-argument.c b/gi/pygi-argument.c
index ee53469..db79574 100644
--- a/gi/pygi-argument.c
+++ b/gi/pygi-argument.c
@@ -810,11 +810,14 @@ _pygi_argument_to_array (GIArgument  *arg,
                     g_assert (callable_info);
                     length_arg_info = g_callable_info_get_arg (callable_info, length_arg_pos);
                     length_type_info = g_arg_info_get_type (length_arg_info);
+                    g_base_info_unref ( (GIBaseInfo *) length_arg_info);
                     if (!gi_argument_to_gssize (args[length_arg_pos],
                                                 g_type_info_get_tag (length_type_info),
                                                 &length)) {
+                        g_base_info_unref ( (GIBaseInfo *) length_type_info);
                         return NULL;
                     }
+                    g_base_info_unref ( (GIBaseInfo *) length_type_info);
                 }
             }