[file-roller] Fix fr_window_construct memory leak

[Paolo Bacchilega <paobac src gnome org>]

commit 59ef15a2b9af1b74b838b3d83cf15b840525371a
Author: David King <dking redhat com>
Date:   Thu Jul 16 10:48:48 2015 +0100

    Fix fr_window_construct memory leak
    
    Found with Valgrind:
    
    ==9376== 56 (40 direct, 16 indirect) bytes in 1 blocks are definitely
    lost in loss record 10,629 of 17,916
    ==9376==    at 0x721CA3A: g_type_create_instance (gtype.c:1849)
    ==9376==    by 0x71FF0AA: g_object_new_internal (gobject.c:1774)
    ==9376==    by 0x72008C0: g_object_newv (gobject.c:1921)
    ==9376==    by 0x72011AB: g_object_new (gobject.c:1614)
    ==9376==    by 0x5301393: gtk_size_group_new (gtksizegroup.c:425)
    ==9376==    by 0x441548: fr_window_construct (fr-window.c:5740)
    ==9376==    by 0x441548: fr_window_new (fr-window.c:5796)
    ==9376==    by 0x41C490: fr_application_command_line
    (fr-application.c:588)
    ==9376==    by 0xC750D2F: ffi_call_unix64 (in
    /usr/lib64/libffi.so.6.0.2)
    ==9376==    by 0xC75079A: ffi_call (in /usr/lib64/libffi.so.6.0.2)
    ==9376==    by 0x71FAB94: g_cclosure_marshal_generic_va
    (gclosure.c:1594)
    ==9376==    by 0x71FA0C3: _g_closure_invoke_va (gclosure.c:864)
    ==9376==    by 0x7213DD8: g_signal_emit_valist (gsignal.c:3246)
    ==9376==    by 0x72148F1: g_signal_emit (gsignal.c:3393)
    ==9376==    by 0x6F0CF82: g_application_call_command_line
    (gapplication.c:953)
    ==9376==    by 0x6F0F55F: g_application_run (gapplication.c:2292)
    ==9376==    by 0x414FE5: main (main.c:38)
    
    https://bugzilla.gnome.org/show_bug.cgi?id=752476

 src/fr-window.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/fr-window.c b/src/fr-window.c
index 9226c8c..735c9fa 100644
--- a/src/fr-window.c
+++ b/src/fr-window.c
@@ -5729,6 +5729,7 @@ fr_window_construct (FrWindow *window)
        toolbar_size_group = gtk_size_group_new (GTK_SIZE_GROUP_VERTICAL);
        gtk_size_group_add_widget (toolbar_size_group, window->priv->location_bar);
        gtk_size_group_add_widget (toolbar_size_group, window->priv->filter_bar);
+       g_object_unref (toolbar_size_group);
 
        /**/