Another fix from Hung-Te Lin; apparently in some IMEs (such as

Another fix from Hung-Te Lin; apparently in some IMEs (such as
"MS NewPhonetics"), move events (arrow keys) were being doubled up,
apparently because we turned both KEYDOWN and KEYUP events into new
KEYDOWN events.

I don't claim to understand the precise effect of this patch :( but
I'm reasonably confident that it only affects IME users, and experimentally
it doesn't seem to break anything obvious, so if piaip says it makes
things better that's good enough for me :)

git-svn-id: svn://svn.tartarus.org/sgt/putty@5545 cda61777-01e9-0310-a592-d414129be87e