git xfsprogs don't build

[Christoph Hellwig]

On Fri, Mar 04, 2011 at 05:36:08PM +0100, Marc Lehmann wrote:
> That almost certainly means somebody tried to build a shared object or
> library with some object file compiled without -fPIC.

That function indeed doesn't exist in non-debug builds.  But by default
we do not build xfsprogs that way.  For now make sure to not have
-DNDEBUG in your CFLAGS, I'll make sure we get a proper fix commited.