Fix size incompatibility on IStreamBase serialization between 32/64 bit platforms.
Fix size incompatibility on IStreamBase serialization between 32/64 bit platforms.

paintdream/PaintsNow,paintdream/PaintsNow,paintdream/PaintsNow,paintdream/PaintsNow,paintdream/PaintsNow,paintdream/PaintsNow,paintdream/PaintsNow,paintdream/PaintsNow,paintdream/PaintsNow