Hi!

Mere cosmetics.

- if (foo != NULL)
    free (foo);

With the caveat that coccinelle ruins replacement whitespace or i'm
uneducated enough to be unable to _not_ run the diff through
 sed -e 's/^+\([[:space:]]*\)free(/+\1free (/'
at least. If anybody knows how to improve replacement whitespace,
i'd be interrested but didn't look nor ask. ISTM that leading
whitespace is somewhat ruined, too, so beware (8 spaces versus tab as
far as i have spot-checked).

Would touch
 gcc/ada/rtinit.c             |    3 +--
 intl/bindtextdom.c           |    3 +--
 intl/loadmsgcat.c            |    6 ++----
 intl/localcharset.c          |    3 +--
 libbacktrace/xztest.c        |    9 +++------
 libbacktrace/zstdtest.c      |    9 +++------
 libbacktrace/ztest.c         |    9 +++------
 libgfortran/caf/single.c     |    6 ++----
 libgfortran/io/async.c       |    6 ++----
 libgfortran/io/format.c      |    3 +--
 libgfortran/io/transfer.c    |    6 ++----
 libgfortran/io/unix.c        |    3 +--
 libgo/runtime/go-setenv.c    |    6 ++----
 libgo/runtime/go-unsetenv.c  |    3 +--
 libgomp/target.c             |    3 +--
 libiberty/concat.c           |    3 +--
 zlib/contrib/minizip/unzip.c |    2 +-
 zlib/contrib/minizip/zip.c   |    2 +-
 zlib/examples/enough.c       |    6 ++----
 zlib/examples/gun.c          |    2 +-
 zlib/examples/gzjoin.c       |    3 +--
 zlib/examples/gzlog.c        |    6 ++----

coccinelle script and invocation inline.
Would need to be split for the respective maintainers and run through
mklog with subject changelog and should of course be compiled and
tested before that.

Remarks:
1) We should do this in if-conversion (?) on our own.
   I suppose. Independently of -fdelete-null-pointer-checks
2) Maybe not silently, but raise language awareness nowadays.
   By now it's been a long time since this was first mandated.
3) fallout from looking at something completely different
4) i most likely will not remember to split it apart and send proper
   patches, tested patches, in stage 1 to maintainers proper, so if
   anyone feels like pursuing this, be my guest. I thought i'd just
   mention it.

cheers,