CH_VERSION
hdr->ch_version = CH_VERSION;
if (hdr->ch_version != CH_VERSION) {
srcfile, (uint64_t)hdr->ch_version, CH_VERSION);
hdr->ch_version != CH_VERSION || hdr->ch_algorithm != CH_ALG_ZLIB ||
if (hdr->ch_magic != CH_MAGIC_ZLIB || hdr->ch_version != CH_VERSION ||