hg: jdk/hs: 8198906: JDK-8196882 breaks VS2013 Win32 builds

[kim.barrett at oracle.com]

Changeset: d17b6a80ae08
Author:    kbarrett
Date:      2018-03-02 03:14 -0500
URL:       http://hg.openjdk.java.net/jdk/hs/rev/d17b6a80ae08

8198906: JDK-8196882 breaks VS2013 Win32 builds
Summary: Add cast to eliminate warning.
Reviewed-by: dholmes, stuefe

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