printing: Fix compilation error for native 32-bit time_t

printing: Fix compilation error for native 32-bit time_t

commit#e9a7dce599eb12d broke samba compilation for 32-bit time_t.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15976
Used correct pointer type to fix the warning to fix compialtion.

Pair-Programmed-With: Vinit Agnihotri <vagnihot@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Vinit Agnihotri <vagnihot@redhat.com>
Reviewed-by: Günther Deschner <gd@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Wed Jan 21 19:23:29 UTC 2026 on atb-devel-224