Broken strncat macro

[Ulrich Drepper]

"Joseph S. Myers" <jsm28@cam.ac.uk> writes:

> glibc's strncat macro is broken on i686-linux when you define
> __USE_STRING_INLINES: it fails to append the terminating null character
> when the length to concatenate is less than the string length.

Thanks.  I've fixed the problems and added the test case.

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