[Bug locale/22025] iconv: Inconsistency between pointer mangling and NULL checks

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https://sourceware.org/bugzilla/show_bug.cgi?id=22025

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=1cf1232cd4721dc155a5cf7d571e5b1dae506430

commit 1cf1232cd4721dc155a5cf7d571e5b1dae506430
Author: Patsy Franklin <pfrankli@redhat.com>
Date:   Tue Aug 29 15:53:28 2017 +0200

    gconv: Consistently mangle NULL function pointers [BZ #22025]

    Not mangling NULL pointers is not safe because with very low
    probability, a non-NULL function pointer can turn into a NULL pointer
    after mangling.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog           |   20 ++++++++++++++++++++
 iconv/gconv_cache.c |   11 +++++------
 iconv/gconv_db.c    |   41 ++++++++++++++++-------------------------
 iconv/gconv_dl.c    |    6 ++----
 wcsmbs/btowc.c      |    8 ++++----
 5 files changed, 47 insertions(+), 39 deletions(-)

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