wipefs: force GPT detection

The library libblkid (as well as fdisks) requires protective MBR when
probe for GPT by default.  This is unnecessary for wipefs where we're
more promiscuous and we want to delete as much as possible. This patch
enables BLKID_PARTS_FORCE_GPT for wipefs.

Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1326474
Signed-off-by: Karel Zak <kzak@redhat.com>

misc-utils/wipefs.c

@@ -261,8 +261,8 @@ new_probe(const char *devname, int mode)
 			BLKID_SUBLKS_BADCSUM);	/* accept bad checksums */
 
 	blkid_probe_enable_partitions(pr, 1);
-	blkid_probe_set_partitions_flags(pr, BLKID_PARTS_MAGIC);
-
+	blkid_probe_set_partitions_flags(pr, BLKID_PARTS_MAGIC |
+					     BLKID_PARTS_FORCE_GPT);
 	return pr;
 error:
 	blkid_free_probe(pr);