OS-1571 Placate gcc -Wparentheses
Reviewed by: Robert Mustacchi <rm@joyent.com>

*** 272,283 ****
          mutex_exit(&mvp->v_lock);
  
          /* Having the resource be anything but "swap" doesn't make sense. */
          vfs_setresource(vfsp, "swap", 0);
  
!         if (error = pn_get(uap->dir,
!             (uap->flags & MS_SYSSPACE) ? UIO_SYSSPACE : UIO_USERSPACE, &dpn))
                  goto out;
  
          if ((hm = hyprlofs_memalloc(sizeof (hlfsmount_t), 0)) == NULL) {
                  pn_free(&dpn);
                  error = ENOMEM;
--- 272,284 ----
          mutex_exit(&mvp->v_lock);
  
          /* Having the resource be anything but "swap" doesn't make sense. */
          vfs_setresource(vfsp, "swap", 0);
  
!         if ((error = pn_get(uap->dir,
!             (uap->flags & MS_SYSSPACE) ? UIO_SYSSPACE : UIO_USERSPACE,
!             &dpn)) != 0)
                  goto out;
  
          if ((hm = hyprlofs_memalloc(sizeof (hlfsmount_t), 0)) == NULL) {
                  pn_free(&dpn);
                  error = ENOMEM;