open, openat: minor optimization

[pspp] / ChangeLog

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 2009-09-22  Eric Blake  <ebb9@byu.net>
 
+       open, openat: minor optimization
+       * lib/open.c (open): If open succeeded, len is non-zero.
+       * lib/openat.c (rpl_openat): Likewise.
+
        link-follow: ensure correct result
        * m4/fcntl_h.m4 (gl_FCNTL_H): Clean up temporary file.
        * m4/link-follow.m4 (gl_FUNC_LINK_FOLLOWS_SYMLINK): Likewise, and