[file-roller] removed deprecated function gdk_cursor_unref

[Paolo Bacchilega <paobac src gnome org>]

commit 59db4a858e72d9069db6972b961b77c2c5a8ec36
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Wed May 30 18:21:12 2012 +0200

    removed deprecated function gdk_cursor_unref

 src/dlg-package-installer.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/dlg-package-installer.c b/src/dlg-package-installer.c
index f8feff7..ecc4f55 100644
--- a/src/dlg-package-installer.c
+++ b/src/dlg-package-installer.c
@@ -170,7 +170,8 @@ install_packages (InstallerData *idata)
 
 			cursor = gdk_cursor_new (GDK_WATCH);
 			gdk_window_set_cursor (window, cursor);
-			gdk_cursor_unref (cursor);
+
+			g_object_unref (cursor);
 		}
 
 		proxy = g_dbus_proxy_new_sync (connection,