Linux: fix a syntax error in the latest version of xdg-utils. Will report it.

scripts/xdg-open

 #!/bin/sh
 #---------------------------------------------
 #   xdg-open
 #
 #   Utility script to open a URL in the registered default application.
 #
 #   Refer to the usage() function below for usage.
 #
 #   Copyright 2009-2010, Fathi Boudra <fabo@freedesktop.org>
 #   Copyright 2009-2010, Rex Dieter <rdieter@fedoraproject.org>
@@ skipping 300 matching lines @@
     elif `dbus-send --print-reply --dest=org.freedesktop.DBus /org/freedesktop/DBus org.freedesktop.DBus.GetNameOwner string:org.gnome.SessionManager > /dev/null 2>&1` ; then DE=gnome;
     elif xprop -root _DT_SAVE_MODE 2> /dev/null | grep ' = \"xfce4\"$' >/dev/null 2>&1; then DE=xfce;
     elif xprop -root 2> /dev/null | grep -i '^xfce_desktop_window' >/dev/null 2>&1; then DE=xfce
     fi
 
     if [ x"$DE" = x"" ]; then
       # fallback to checking $DESKTOP_SESSION
       case "$DESKTOP_SESSION" in
          gnome)
            DE=gnome;
+           ;;
          LXDE)
            DE=lxde; 
            ;;
          xfce|xfce4)
            DE=xfce;
            ;;
       esac
     fi
 
     if [ x"$DE" = x"" ]; then
@@ skipping 279 matching lines @@
     ;;
 
     generic)
     open_generic "$url"
     ;;
 
     *)
     exit_failure_operation_impossible "no method available for opening '$url'"
     ;;
 esac