Please test pari-2.7.1 prerelease 2

[Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>]

Dear PARI developers,

Following a bug report by Jeroen about nfhilbert,
I have made a second prerelease of PARI 2.7.1

Please test the prerelease tarball:
<http://pari.math.u-bordeaux.fr/pub/pari/snapshots/pari-2.7.1-pre2.tar.gz>

The expected release date is moved to the 14/05/2014

This release addresses in particular a problem with 'make install' on OS X. 

Below is the changelog:

Done for version 2.7.1 (released 14/05/2014):
[last column crossreferences current development release 2.8.0]

  Fixed
    1- make install fails on OS/X: ln -s libpari.dylib libpari.dylib fails [F1]
    2- Q_pvalrem(t_FRAC) => wrong result                                   [F2]
    3- [] == 0 but []~ != 0  (now []~ == 0 as well) [#1560]                [F3]
BA  4- test-kernel did not work when using --mt=pthread                    [F4]
BA  5- ellheegner was using too much memory in some case                   [F5]
BA  6- ellap can overflow on 32-bit machine [#1558] (minimal fix)          [F6]
    7- nfhilbert(K,x,y, P above 2) could give wrong results [#1561]        [F7]
    8- gcd(1/2, 1+I*1.) -> SEGV [#1563]                                   [F10]
    9- mathnf(t_VEC) could corrupt input (change sign)                    [F11]
   10- [libpari] RgM_transmul did not work                                [F12]
   11- [libpari] Fq_issquare didn't support T=NULL                        [F13]
   12- [libpari] nfpow_u didn't handle non-integral rational numbers      [F14]
   13- eint1(0) -> stack overflow [#1568]                                 [F15]

Thanks in advance,
Bill.