[PATCH] Fix NO_LOCAL_CLIENT_CRED build

[Ray Strode]

Hi,

> This is a build fix for MinGW
... 
> Move the check if NO_LOCAL_CLIENT_CRED should be defined to before it's first
> use.
Well, Alan wondered if anyone is actually using NO_LOCAL_CLIENT_CRED, now we know!

Patch doesn't look wrong to me, but I wonder if maybe it should get put in configure.ac?
I think that's a more typical place for platform specific definitions.

--Ray