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

*** 1956,1966 ****
                  if (!zc->zc_objset_stats.dds_inconsistent &&
                      dmu_objset_type(os) == DMU_OST_ZVOL) {
                          error = zvol_get_stats(os, nv);
                          if (error == EIO)
                                  return (error);
!                         VERIFY3S(error, ==, 0);
                  }
                  error = put_nvlist(zc, nv);
                  nvlist_free(nv);
          }
  
--- 1956,1966 ----
                  if (!zc->zc_objset_stats.dds_inconsistent &&
                      dmu_objset_type(os) == DMU_OST_ZVOL) {
                          error = zvol_get_stats(os, nv);
                          if (error == EIO)
                                  return (error);
!                         VERIFY0(error);
                  }
                  error = put_nvlist(zc, nv);
                  nvlist_free(nv);
          }