[Lazarus] Two TAChart patches

[Werner Pamler]

Could somebody please have a look at these issues with TAChart and apply 
the patches that I posted in bugtracker:

http://mantis.freepascal.org/view.php?id=25456
http://mantis.freepascal.org/view.php?id=25439
http://mantis.freepascal.org/view.php?id=25452

I wonder why Alexander Klenin is no longer visible in the forum and here 
in the mailing list. I hope he is doing well.