Small patch for xrealloc_getcwd_or_warn

[Denys Vlasenko]

On Saturday 29 September 2007 04:16, Loïc Grenié wrote:
>    Removes a couple of bytes.

Thanks, applied.

The code also does not reallocate buffer _down_ to minimum needed size.
This can waste some RAM. I am adding cwd = xrealloc(cwd, strlen(cwd) + 1).
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vda