3006 VERIFY[S,U,P] and ASSERT[S,U,P] frequently check if first argument is zero

@@ -172,11 +172,11 @@
 
 static void
 traverse_pause(traverse_data_t *td, const zbookmark_t *zb)
 {
         ASSERT(td->td_resume != NULL);
-        ASSERT3U(zb->zb_level, ==, 0);
+        ASSERT0(zb->zb_level);
         bcopy(zb, td->td_resume, sizeof (*td->td_resume));
 }
 
 static int
 traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,