check-abi failure with sys_errlist

[Andreas Schwab]

There really is nothing magic here, just a simple fencepost error.
Instead of defining the maximum error number it defined the number +1
which resulted in extra inflation.

Forget about sparc, it is completly unaffected, since it doesn't have an
inflated errlist-compat number.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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