[Bug-gsl] gsl-1.11/cheb/deriv.c question?

[Ben Taylor]

I'm compiling gsl-1.11 on Solaris/Express (SXCE) and seeing a bit of
an odd error.

line 42 starts with

#ifdef ERR
  deriv->err = n * n * f->c[n-1];   /* error in derivative is n^2 c_n */
#endif

and for some reason, my build trips over this, because the
structure pointer deriv ( gsl_cheb_series ) doesn't have
a "err" member?

Ideas?  It compiles cleanly if I remove this.

Ben