Fixed keysizes not being properly wiped when the stream buffer is.
Fixed keysizes not being properly wiped when the stream buffer is.

DDVTECH/mistserver,DDVTECH/mistserver,DDVTECH/mistserver,DDVTECH/mistserver,rbouqueau/mistserver,rbouqueau/mistserver,DDVTECH/mistserver,rbouqueau/mistserver,rbouqueau/mistserver,rbouqueau/mistserver