Revert portions of r1571499.

* subversion/libsvn_subr/ctype.c:
    Revert, because it breaks the windows build (see extractor.py).

* subversion/tests/libsvn_subr/named_atomic-test-common.h
    Revert, because it breaks the warnings bot.  (If there's a better fix
    it can come in a subsequent commit.)


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1571500 13f79535-47bb-0310-9956-ffa450edef68