RFR(XS): 8149780: GatherProcessInfoTimeoutHandler shouldn't call getWin32Pid if the lib isn't load

[Kirill Zhaldybin]

Dear all,

Could you please review this small fix for 8149780 which adds correct 
handling of situation when the lib is not loaded?

WebRev: http://cr.openjdk.java.net/~kzhaldyb/webrevs/JDK-8149780/webrev.00/

CR: https://bugs.openjdk.java.net/browse/JDK-8149780

Thank you.

Regards, Kirill