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

*** 305,315 ****
                          return (EINVAL);
                  if (nm[1] == '.' && nm[2] == '\0')
                          return (EEXIST); /* thus in ufs */
          }
  
!         if (error = hyprlofs_taccess(dir, VEXEC|VWRITE, cr))
                  return (error);
  
          if (dir->hln_dir == NULL)
                  return (ENOENT);
  
--- 305,315 ----
                          return (EINVAL);
                  if (nm[1] == '.' && nm[2] == '\0')
                          return (EEXIST); /* thus in ufs */
          }
  
!         if ((error = hyprlofs_taccess(dir, VEXEC|VWRITE, cr)) != 0)
                  return (error);
  
          if (dir->hln_dir == NULL)
                  return (ENOENT);