7127  remove -Wno-missing-braces from Makefile.uts

*** 546,556 ****
  traverse_impl(spa_t *spa, dsl_dataset_t *ds, uint64_t objset, blkptr_t *rootbp,
      uint64_t txg_start, zbookmark_phys_t *resume, int flags,
      blkptr_cb_t func, void *arg)
  {
          traverse_data_t td;
!         prefetch_data_t pd = { 0 };
          zbookmark_phys_t czb;
          int err;
  
          ASSERT(ds == NULL || objset == ds->ds_object);
          ASSERT(!(flags & TRAVERSE_PRE) || !(flags & TRAVERSE_POST));
--- 546,556 ----
  traverse_impl(spa_t *spa, dsl_dataset_t *ds, uint64_t objset, blkptr_t *rootbp,
      uint64_t txg_start, zbookmark_phys_t *resume, int flags,
      blkptr_cb_t func, void *arg)
  {
          traverse_data_t td;
!         prefetch_data_t pd = { .pd_flags = 0 };
          zbookmark_phys_t czb;
          int err;
  
          ASSERT(ds == NULL || objset == ds->ds_object);
          ASSERT(!(flags & TRAVERSE_PRE) || !(flags & TRAVERSE_POST));