Update chat.simba

..::Fixed::.. -> TextCoords function, simply -4 to the result.y, so the text lined up correctly.
Can see previous discussion here: http://villavu.com/forum/showthread.php?t=97281 - posts #56 to 62.


Reason why it might have changed? (Don't honestly know)
I assume there was an adjustment in-game to the chat box, or the get chat messages were never tested, or there was a change at one point somewhere..