[KinoSearch] revision 3527 t/015-sort_external UTF-8 malformed char

[Henry]

Hi Marvin,

On my setup revision 3527 is complaining as below:

t/015-sort_external..............ok 1/17Malformed UTF-8 character (UTF-16
surrogate 0xd974) in subroutine entry at t/015-sort_external.t line 145.
Malformed UTF-8 character (UTF-16 surrogate 0xd974) in subroutine entry at
t/015-sort_external.t line 145.
t/015-sort_external..............ok

Doesn't seem too serious since the test passes with "ok", but here's the
report anyway.

Regards
Henry