bug#16647: Imprecisions with window-resizing cursors

[martin rudalics]

> Why do you need an exactly the same signature?  Can't a macro or a
> wrapper function take care of the differences?  The code will have to
> be separately compiled on each platform anyway.

Sure.  But for me writing a macro or a wrapper is tantamount to writing
that function from scratch.  Having it in the RIF would be optimal.

martin