DEBUG: stream: Fix stream trace message to print response buffer state

Channels buffer state is displayed in the strem trace messages. However,
because of a typo, the request buffer was used instead of the response one.

This patch should be backported as far as 2.2.

(cherry picked from commit 5ce1299c643543c9b17b4124b299feb3caf63d9e)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 7fe753c85a99c1791f7d0df55df4b55c93dc66fb)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed