Prefer VERIFY0(n) over VERIFY3U(n, ==, 0)

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Sponsored-by: https://despairlabs.com/sponsor/
Closes #17591

module/zfs/sa.c

@@ -2013,7 +2013,7 @@ sa_modify_attrs(sa_handle_t *hdl, sa_attr_type_t newattr,
 				 * Only a variable-sized attribute can be
 				 * replaced here, and its size must be changing.
 				 */
-				ASSERT3U(reg_length, ==, 0);
+				ASSERT0(reg_length);
 				ASSERT3U(length, !=, buflen);
 				SA_ADD_BULK_ATTR(attr_desc, j, attr,
 				    locator, datastart, buflen);