Uninitialised memory detected by Valgrind after mpn_sec_tabselect on i686

[Torbjörn Granlund]

Mike Crowe <mac at mcrowe.com> writes:

  FWIW we run the same Valgrind tests on x86_64 too, but don't see the same
  problem there. (Configured with --host=x86_64-oe-linux, using
  x86_64/sec_tabselect.asm.)

It seems that only x86/sec_tabselect.asm chose the right operand in the
problematic way.

I have a rewrite of the code, which avoids the problem.

-- 
Torbjörn
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