Fix for issue #433.

git-svn-id: http://achartengine.googlecode.com/svn/trunk@568 0b5bfab6-fc16-11dd-ac65-f74f249cfaac
Fix for issue #386.

git-svn-id: http://achartengine.googlecode.com/svn/trunk@569 0b5bfab6-fc16-11dd-ac65-f74f249cfaac