Use 0 instead of PIPE_OK in u_hash_table.c
Because pipe_error and PIPE_OK is comes from pipe/p_defines.h that doesn't belong
to src/util/
Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19676>