RFR: 8196882: VS2017 Hotspot Defined vsnprintf Function Causes C2084 Already Defined Compilation Error

[Thomas Stüfe]

>
> Very minor nit: There is the theoretical possibility of _vsnprintf
> returning -1 for some reason other than errno.
>

I meant to say, "  for some reason other than truncation". Sorry, slip of
mind :)

Thanks, Thomas