libfsimage: fix parentheses in macro parameters

VERIFY_DN_TYPE and VERIFY_OS_TYPE should use parentheses when
accessing the type parameter. Note that none of the current usages
require this, it's just done for correctness.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Wei Liu <wl@xen.org>

tools/libfsimage/zfs/fsys_zfs.h

@@ -71,7 +71,7 @@ typedef	unsigned int size_t;
  * Can only be used in functions returning non-0 for failure.
  */
 #define	VERIFY_DN_TYPE(dnp, type) \
-	if (type != DMU_OT_NONE && (dnp)->dn_type != type) { \
+	if ((type) != DMU_OT_NONE && (dnp)->dn_type != (type)) { \
 		return (ERR_FSYS_CORRUPT); \
 	}
 
@@ -80,7 +80,7 @@ typedef	unsigned int size_t;
  * Can only be used in functions returning 0 for failure.
  */
 #define	VERIFY_OS_TYPE(osp, type) \
-	if (type != DMU_OST_NONE && (osp)->os_type != type) { \
+	if ((type) != DMU_OST_NONE && (osp)->os_type != (type)) { \
 		errnum = ERR_FSYS_CORRUPT; \
 		return (0); \
 	}