Class version has a minor bug, unable to render multiple thumbnails on a window

[Ciantic]

I know this is not your most pressing issue, but if someone else is using this, it might be a useful note here.

Currently one can't render multiple thumbnails to a window, because of a little bug.

To fix this change:

	__New(hDestination, hSource)
	{
		VarSetCapacity(thumbnail,	4,	0)

to this:

	__New(hDestination, hSource)
	{
		local thumbnail
		VarSetCapacity(thumbnail,	4,	0)

And it should work.

P.S. it's possible that other methods are similarily broken, and need a local variable before VarSetCapacity, but I'm not a fan of AHK language and the way it won't give you a sensible errors.