RFR(XS): 8188135: Fix VS 2010 build after "8187631: Refactor FileDescriptor close implementation"

[Lindenmaier, Goetz]

Hi,

please review this tiny fix for the build with Visual Studio 2010:
http://cr.openjdk.java.net/~goetz/wr17/8188135-winBuild/webrev.01/

Best regards,
  Goetz.