/* We zero directly the memory from start of allocation. */
memset(&((char *) *fb)[old_alloc_len], 0, new_alloc_len - old_alloc_len);
(*fb)->alloc_len = new_alloc_len;
/* We zero directly the memory from start of allocation. */
memset(&((char *) *fb)[old_alloc_len], 0, new_alloc_len - old_alloc_len);
(*fb)->alloc_len = new_alloc_len;