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[Lapack] Question about dspevx error handling.

  The INFO parameter for dspevx only describes a failure with eigenvectors
failing to converge.

      INFO    (output) INTEGER
              = 0:  successful exit
              < 0:  if INFO = -i, the i-th argument had an illegal value
              > 0:  if INFO = i, then i eigenvectors failed to converge.
                    Their indices are stored in array IFAIL.

If DSTEBZ fails and JOBZ='N', then dspevx will return with INFO>0 but it
has nothing to do with an eigenvector converging failure.
Should INFO be set to zero after DSTEBZ returns?

Thanks and best regards,
Phil DeMier.
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