fixes exception introduced in r3305

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3307 4ab978e6-3352-0410-996c-0b42db0051c8
fixed regression from r3265 - CWCheats window closes application
added window position saving for CWCheats window

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3308 4ab978e6-3352-0410-996c-0b42db0051c8