regex_internal.h: define __attribute_warn_unused_result__

[pspp] / ChangeLog

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 2010-01-28  Jim Meyering  <meyering@redhat.com>
 
+       regex_internal.h: define __attribute_warn_unused_result__
+       * lib/regex_internal.h (__attribute_warn_unused_result__): Define.
+
        maint: add a syntax-check rule to check for vulnerable Makefile.in
        * top/maint.mk (sc_vulnerable_makefile_CVE-2009-4029): New rule.