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