Fix a Windows compilation problem with prior commit.
Fix a Windows compilation problem with prior commit.

ValveSoftware/vogl,bclemetsonblizzard/vogl,kingtaurus/vogl,bclemetsonblizzard/vogl,ValveSoftware/vogl,ValveSoftware/vogl,ValveSoftware/vogl,kingtaurus/vogl,bclemetsonblizzard/vogl,bclemetsonblizzard/vogl,kingtaurus/vogl,bclemetsonblizzard/vogl,kingtaurus/vogl