plug-ins: Quiet some 64-bit to 32-bit warnings on 64-bit OSes, specifically OS X.

git-svn-id: https://pcsxr.svn.codeplex.com/svn@91796 e17a0e51-4ae3-4d35-97c3-1a29b211df97
OS X: QuickLook: Have the thumbnail images for the memory cards changed to 32 pixels.
Minor coding style changes.

git-svn-id: https://pcsxr.svn.codeplex.com/svn@91797 e17a0e51-4ae3-4d35-97c3-1a29b211df97