(Patch by KrossX) - Fix memory card issues from r5703 (should fix Persona 3/4, possibly MGS3, possibly others).

Please report here if there are still games which suffer from memory card issues. Thanks to KrossX for the quick fix.

git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5706 96395faa-99c1-11dd-bbfe-3dabce05a288