volume_id: enable minix detection

function                                             old     new   delta
volume_id_probe_minix                                  -      87     +87
fs2                                                   64      68      +4
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 1/0 up/down: 91/0)               Total: 91 bytes

Patch by wdlkmpx <wdlkmpx@gmail.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/util-linux/volume_id/volume_id_internal.h b/util-linux/volume_id/volume_id_internal.h
index 759a832..0eaea9b 100644
--- a/util-linux/volume_id/volume_id_internal.h
+++ b/util-linux/volume_id/volume_id_internal.h
@@ -193,7 +193,7 @@
 
 //int FAST_FUNC volume_id_probe_mac_partition_map(struct volume_id *id /*,uint64_t off*/);
 
-//int FAST_FUNC volume_id_probe_minix(struct volume_id *id /*,uint64_t off*/);
+int FAST_FUNC volume_id_probe_minix(struct volume_id *id /*, uint64_t off*/);
 
 //int FAST_FUNC volume_id_probe_msdos_part_table(struct volume_id *id /*,uint64_t off*/);