[PATCH] explorerframe: Use wide-char string literals.

[Marvin]

Hi,

While running your changed tests, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=79817

Your paranoid android.


=== w1064v1809 (64 bit report) ===

explorerframe:
nstc.c:2080: Test failed: Got event 17, count 1
nstc.c:2113: Test failed: Got event 17, count 1
nstc.c:2130: Test failed: Got event 17, count 1
nstc.c:2141: Test failed: Got event 17, count 9