Question on Evan Miller's tutorial - Body filter?

[ctasdemir]

Hello,
I'm going through Evan Miller's tutorial on Nginx module. In part "4.2.
Anatomy of a Body Filter", there's a piece of code like this:
"And hook the buffer into a new chain link:

    ngx_chain_t   added_link;

    added_link.buf = b;
    added_link.next = NULL;
Finally, hook the new chain link to the final chain link we found
before:

    chain_link->next = added_link;
And reset the "last_buf" variables to reflect reality:

    chain_link->buf->last_buf = 0;
    added_link->buf->last_buf = 1;"

At the last line, added_link is being used as a structure pointer but at
the beginning it's defined as a structure. Am i missing something?
Compiler gives error for this incompetible usage.

Thanks

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,181975,181975#msg-181975