GIF_HASH_SIZE
hash = malloc(sizeof(struct gif_list) * GIF_HASH_SIZE,
for (i = 0; i < GIF_HASH_SIZE; i++)
#ifndef GIF_HASH_SIZE
in_gif_hashval((src), (dst)) & (GIF_HASH_SIZE - 1)])
fnv_32_buf(&(src), sizeof(src), FNV1_32_INIT) & (GIF_HASH_SIZE - 1)])
in6_gif_hashval((src), (dst)) & (GIF_HASH_SIZE - 1)])
fnv_32_buf((src), sizeof(*src), FNV1_32_INIT) & (GIF_HASH_SIZE - 1)])