Make definition of off_t robust against misbehaving w32 toolchains.
* configure.ac (NEED__FILE_OFFSET_BITS): Change to define gpgme_off_t and gpgme_ssize_t. (API__OFF_T, API__SSIZE_T): New ac_subst. * src/gpgme.h.in: Replace all ssize_t and off_t by ac_subst macros. * src/assuan-support.c, src/ath-pthread.c, src/ath.c, src/ath.h * src/data-compat.c, src/data-fd.c, src/data-mem.c, src/data-stream.c * src/data-user.c, src/data.c, src/data.h, src/engine-gpgsm.c * src/engine-uiserver.c, src/gpgme-tool.c, src/gpgme.c: Replace off_t by gpgme_off_t and sszie_t by gpgme_ssize_t. * src/ath-pthread.c, src/ath.h: Include gpgme.h.
For a detailed description, see the gpgme.texi diff.