Flag the L_() function with attribute format_arg.
* agent/agent.h (LunderscorePROTO): New. * common/util.h (GNUPG_GCC_ATTR_FORMAT_ARG): New. * common/i18n.h (GNUPG_GCC_ATTR_FORMAT_ARG): New. Use for i18n_localegettext. Expand LunderscorePROTO. * agent/genkey.c (check_passphrase_constraints): Use xtryasprintf again to keep the old translations.
- Signed-off-by: Werner Koch <wk@gnupg.org>