pidl/ws: fix indent (use 4 tabs) and remove trailing whitespace

pidl/ws: fix indent (use 4 tabs) and remove trailing whitespace

Port Wireshark commit 4110bde

Author: Alexis La Goutte <alexis.lagoutte@gmail.com>
Date:   Fri Sep 26 19:51:34 2014 +0200

    PIDL: fix indent (use 4 tabs) and remove trailing whitespace

    Change-Id: I0ee63a040867b44ac9915704f5e581483ed6f7e2
    Reviewed-on: https://code.wireshark.org/review/4310
    Reviewed-by: Anders Broman <a.broman58@gmail.com>
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>