pthread00 hangs if dprintf is used, and works well if fprintf is used.

One more mention of this bug is here:
http://sourceware.org/bugzilla/show_bug.cgi?id=12847Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>