Work around getline() bug on FreeBSD 8.0.

[pspp] / ChangeLog

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+2010-01-31  Bruno Haible  <bruno@clisp.org>
+
+       Work around getline() bug on FreeBSD 8.0.
+       * m4/getline.m4 (gl_FUNC_GETLINE): Also test result for a NULL buffer
+       and a non-zero size.
+       * tests/test-getline.c (main): Likewise.
+       * doc/posix-functions/getline.texi: Mention the FreeBSD bug.
+       Reported by Dennis <noordsij@cs.helsinki.fi> via Eric Blake.
+
 2010-01-28  Eric Blake  <ebb9@byu.net>
 
        regex: fix build failure