h->maplog_major_version = MAPLOG_MAJOR_VERSION;
h->maplog_minor_version = MAPLOG_MINOR_VERSION;
h->maplog_patch_version = MAPLOG_PATCH_VERSION;
h->maplog_major_version = MAPLOG_MAJOR_VERSION;
h->maplog_minor_version = MAPLOG_MINOR_VERSION;
h->maplog_patch_version = MAPLOG_PATCH_VERSION;