Avoid Java exception NegativeArraySizeException.

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3424 4ab978e6-3352-0410-996c-0b42db0051c8
Fix in loader: correctl interpret the section header address when it is not relative to the base address.

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3425 4ab978e6-3352-0410-996c-0b42db0051c8