since OpenLayers.Bounds supports pixels, getHeight() should return absolute values

patch for BaseTypes.js

discussed on dev@ list and we are going to postpone taking action on this one until further notice:

I havent looked at your code to see where/how you are using bounds... but I think I get more or less what the problem is. It is designed for use with lonlat and you need it for pixels.

Can you give us a sense of how necessary this new functionality would be to you?

I'm only using bounds in pixel space for the bounds of the little extent rectangle on the overview map. Seems easiest for me to wrap my getHeight calls in a Math.abs(). Until another case comes up, there is probably no reason to muck with Bounds.

ok. that sounds reasonable. keep this in mind though, as if it comes up again, it might be worth reconsidering...