Fixed a bug in mpir_invert_pi2 triggered by the MPFR test code.
Merge branch 'master' of https://github.com/wbhart/mpir
Fix for section headers too long on Mac. Thanks Leif Lionhardy.
Fix undefined reference to LONG_MAX for PPL. Reported by JP Flori.
Merge branch 'master' of https://github.com/wbhart/mpir
add the mpn_mul_fft function (needed by GMP-ECM) and update Windows builds accordingly