core: Replace all calls to *sprintf by gpgrt_*sprintf.
* configure.ac (vasprintf): Remove check. * src/vasprintf.c: Remove file. * src/util.h (vasprintf, asprintf): Remove prototypes. Replace all calls to vasprintf and asprintf by gpgrt_vasprintf or gpgrt_asprintf. Also take care to use gpgrt_free on the returned value. * src/w32-util.c (_gpgme_get_gpgconf_path): Replace a gpgrt_asprintf by _gpgme_strconcat. (snprintf): New macro to use gpgrt_snprintf instead of the system's standard snprintf.
- Signed-off-by: Werner Koch <wk@gnupg.org>