[perl-Glib-Object-Introspection] Avoid a segfault in an error branch

[Torsten Schönfeld <tsch src gnome org>]

commit 7fdc5df8ca2dbaa6d26c1ccf2549e253c104a80f
Author: Torsten Schönfeld <kaffeetisch gmx de>
Date:   Fri Mar 6 17:34:41 2015 +0100

    Avoid a segfault in an error branch
    
    In Glib::Object::Introspection::_construct_boxed.

 GObjectIntrospection.xs |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/GObjectIntrospection.xs b/GObjectIntrospection.xs
index 1a2e81d..e3f0028 100644
--- a/GObjectIntrospection.xs
+++ b/GObjectIntrospection.xs
@@ -617,7 +617,6 @@ _construct_boxed (class, package)
        repository = g_irepository_get_default ();
        info = g_irepository_find_by_gtype (repository, gtype);
        if (!info) {
-               g_base_info_unref (info);
                ccroak ("Could not fetch information for package %s; "
                        "perhaps it has not been loaded via "
                        "Glib::Object::Introspection?",