In old versions of MSVC "when an an array was in a constructor's member initialization list, the elements of the array may not have been default initialized in some cases."

Source: http://msdn.microsoft.com/en-us/library/1ywe7hcy.aspx

Since this affects extremely old MSVC (pre-2k5), we should just squash the warning. This will come by way of server backport (see linked issue)