perror: adjust array size

[pspp] / ChangeLog

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+2011-06-21  Eric Blake  <eblake@redhat.com>
+
+       perror: adjust array size
+       * modules/perror (Depends-on): Add strerror-override.
+       * lib/perror.c (perror): Use it to avoid magic number.
+
+       strerror-override: reduce size
+       * lib/strerror-override.c (strerror_override): Use fewer lines.
+
 2011-06-20  Bruno Haible  <bruno@clisp.org>
 
        pathmax: Ensure correct value for PATH_MAX on HP-UX.