2004-07-20  Morten Welinder  <terra@gnome.org>

	* src/mathfunc.c (lbeta3): Use lgamma_rgnum.

	* src/gutils.c (lgamma_rgnum): When needed, supply this.

	* src/numbers.h (lgamma_rgnum): Add definition for this.

	* configure.in (lgamma_r): Check for this.  Check for long double
	version when needed.