cpan/Encode/t/Unicode_trailing_nul.t leaves temp files behind

[sevan]

$ perl cpan/Encode/t/Unicode_trailing_nul.t
# temp file: /tmp/bx3fP1Dhzr
ok 1 - UTF-16 decodes with trailing NUL
1..1

/tmp/bx3fP1Dhzr remains when test finishes.

Already fixed upstream but a new release hasn't been cut since. Since it's a one word change, raising a bug report in case it can still be accommodated.

[ap]

I opened dankogai/p5-encode#183 asking @dankogai to ship the fix to CPAN.