2002-03-05  Morten Welinder  <welinder@rentec.com>

	* src/analysis-tools.c (fourier_fft_inv, fourier_fft): Improve
	precision.

	* src/mathfunc.h (M_LN2gnum, M_LN10gnum, M_PIgnum, M_PI_2gnum,
	M_LN2gnum, M_LN10gnum, M_SQRT2gnum): Provide high-precision
	constants.