fix FS#41869 - missing dependency libsm

PKGBUILD

-# Maintainer:  Bartłomiej Piotrowski <nospam@bpiotrowski.pl>
+# Maintainer: Florian pritz <bluewind@xinu.at>
+# Contributor: Bartłomiej Piotrowski <nospam@bpiotrowski.pl>
 # Contributor: Brad Fanella <bradfanella@archlinux.us>
 # Contributor: Andrea Scarpino <andrea@archlinux.org>
 # Contributor: tobias <tobias@archlinux.org>
 
 pkgname=openbox
 pkgver=3.5.2
-pkgrel=6
+pkgrel=7
 pkgdesc='Highly configurable and lightweight X11 window manager'
 arch=('i686' 'x86_64')
 url='http://openbox.org'
 license=('GPL')
 depends=('startup-notification' 'libxml2' 'libxinerama' 'libxrandr'
-         'libxcursor' 'pango' 'imlib2' 'librsvg')
+         'libxcursor' 'pango' 'imlib2' 'librsvg' 'libsm')
 optdepends=('kdebase-workspace: for the KDE/Openbox xsession'
             'python2-xdg: for the openbox-xdg-autostart script')
 groups=('lxde')