Patch for keyboard handling

[Takuma Murakami]

> + /* Stored to get internal mode key states.  Must be read-only.  */
> + static unsigned short *g_winInternalModeKeyStatesPtr = NULL;
> 
> Shouldn't this be a pointer to constant data?  Isn't that:
> 
> static unsigned short const * g_winInternalModeKeyStatesPtr = NULL;
> 
> ???

Exactly.  That's what I wanted to do.
Thank you for pointing out.

Takuma Murakami (murakami@ipl.t.u-tokyo.ac.jp)