call fails when it does. (As it is now, there is no way to figure out
the point of error). Shouldn't be a problem since it's most defintily
not a performance-critical path (only called on pgstat startup ATM).

This should help us debug the pipe error message that's on the win32
status page (which I myself have never been able to reproduce, and thus
haven't figured out a better way to debug yet)

Magnus Hagander