This was changed from a unsigned int to a pointer in
e5d37832 and this use was missed,
causing prefix creation hang if the allocated printers array is not
filled with zeros.
Signed-off-by: Rémi Bernon <rbernon@codeweavers.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>