4626 libzfs memleak in zpool_in_use()
Reviewed by: Tony Nguyen <tony.nguyen@nexenta.com>
Reviewed by: Saso Kiselkov <saso.kiselkov@nexenta.com>

*** 1566,1579 ****
                   * read-only, so check the in-core state to see if it's
                   * active and imported read-only.  If it is, set
                   * its state to active.
                   */
                  if (pool_active(hdl, name, guid, &isactive) == 0 && isactive &&
!                     (zhp = zpool_open_canfail(hdl, name)) != NULL &&
!                     zpool_get_prop_int(zhp, ZPOOL_PROP_READONLY, NULL))
                          stateval = POOL_STATE_ACTIVE;
  
                  ret = B_TRUE;
                  break;
  
          case POOL_STATE_ACTIVE:
                  /*
--- 1566,1582 ----
                   * read-only, so check the in-core state to see if it's
                   * active and imported read-only.  If it is, set
                   * its state to active.
                   */
                  if (pool_active(hdl, name, guid, &isactive) == 0 && isactive &&
!                     (zhp = zpool_open_canfail(hdl, name)) != NULL) {
!                         if (zpool_get_prop_int(zhp, ZPOOL_PROP_READONLY, NULL))
                                  stateval = POOL_STATE_ACTIVE;
  
+                         zpool_close(zhp);
+                 }
+ 
                  ret = B_TRUE;
                  break;
  
          case POOL_STATE_ACTIVE:
                  /*