hg: hsx/hotspot-rt/hotspot: 8007312: null check signal semaphore in os::signal_notify windows

[staffan.larsen at oracle.com]

Changeset: 7adae9244bc8
Author:    mgronlun
Date:      2013-02-13 11:23 +0100
URL:       http://hg.openjdk.java.net/hsx/hotspot-rt/hotspot/rev/7adae9244bc8

8007312: null check signal semaphore in os::signal_notify windows
Reviewed-by: dholmes, sla

! src/os/windows/vm/os_windows.cpp