2010-05-07 Marcus Brinkmann <marcus@g10code.de>

• engine-g13.c, gpgme.c, engine-gpgsm.c, engine-gpg.c,

op-support.c, engine-assuan.c, gpgme-tool.c: Include <locale.h>
only if available with HAVE_LOCALE_H and conditionalize use of
LC_CTYPE on its definition.

• engine-gpgconf.c: Do not include <locale.h>.