BUG/MINOR: build: Fix compilation with debug mode enabled

It remained some fragments of the old buffers API in debug messages, here and
there.

This was caused by the recent buffer API changes, no backport is needed.
diff --git a/src/stream.c b/src/stream.c
index 3687bd0..d07a928 100644
--- a/src/stream.c
+++ b/src/stream.c
@@ -851,13 +851,13 @@
 	struct stream_interface *si = &s->si[1];
 	struct channel *req = &s->req;
 
-	DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%d rqt=%d rph=%d rpt=%d cs=%d ss=%d\n",
+	DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%lu rqt=%lu rph=%lu rpt=%lu cs=%d ss=%d\n",
 		now_ms, __FUNCTION__,
 		s,
 		req, &s->res,
 		req->rex, s->res.wex,
 		req->flags, s->res.flags,
-		req->buf->i, req->buf->o, s->res.buf.i, s->res.buf.o, s->si[0].state, s->si[1].state);
+		ci_data(req), co_data(req), ci_data(&s->res), co_data(&s->res), s->si[0].state, s->si[1].state);
 
 	if (si->state == SI_ST_ASS) {
 		/* Server assigned to connection request, we have to try to connect now */
@@ -1046,13 +1046,13 @@
 {
 	struct stream_interface *si = &s->si[1];
 
-	DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%d rqt=%d rph=%d rpt=%d cs=%d ss=%d\n",
+	DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%lu rqt=%lu rph=%lu rpt=%lu cs=%d ss=%d\n",
 		now_ms, __FUNCTION__,
 		s,
 		&s->req, &s->res,
 		s->req.rex, s->res.wex,
 		s->req.flags, s->res.flags,
-		s->req.buf.i, s->req.buf.o, s->res.buf.i, s->res.buf.o, s->si[0].state, s->si[1].state);
+		ci_data(&s->req), co_data(&s->req), ci_data(&s->res), co_data(&s->res), s->si[0].state, s->si[1].state);
 
 	if (si->state != SI_ST_REQ)
 		return;
@@ -1195,13 +1195,13 @@
 	req->analysers &= ~an_bit;
 	req->analyse_exp = TICK_ETERNITY;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		req,
 		req->rex, req->wex,
 		req->flags,
-		req->buf->i,
+		ci_data(req),
 		req->analysers);
 
 	/* now check whether we have some switching rules for this request */
@@ -1320,13 +1320,13 @@
 	struct session *sess = s->sess;
 	struct server_rule *rule;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		req,
 		req->rex, req->wex,
 		req->flags,
-		req->buf->i + req->buf->o,
+		c_data(req),
 		req->analysers);
 
 	if (!(s->flags & SF_ASSIGNED)) {
@@ -1370,13 +1370,13 @@
 	struct session *sess  = s->sess;
 	struct sticking_rule  *rule;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		req,
 		req->rex, req->wex,
 		req->flags,
-		req->buf->i,
+		ci_data(req),
 		req->analysers);
 
 	list_for_each_entry(rule, &px->sticking_rules, list) {
@@ -1471,13 +1471,13 @@
 	int i;
 	int nbreq = s->store_count;
 
-	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%lu analysers=%02x\n",
 		now_ms, __FUNCTION__,
 		s,
 		rep,
 		rep->rex, rep->wex,
 		rep->flags,
-		rep->buf->i,
+		ci_data(rep),
 		rep->analysers);
 
 	list_for_each_entry(rule, &px->storersp_rules, list) {
@@ -1800,14 +1800,14 @@
 	/* Check for connection closure */
 
 	DPRINTF(stderr,
-		"[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%d rqt=%d rph=%d rpt=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
+		"[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%lu rqt=%lu rph=%lu rpt=%lu cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
 		now_ms, __FUNCTION__, __LINE__,
 		t,
 		s, s->flags,
 		req, res,
 		req->rex, res->wex,
 		req->flags, res->flags,
-		req->buf->i, req->buf->o, res->buf->i, res->buf->o, si_f->state, si_b->state,
+		ci_data(req), co_data(req), ci_data(res), co_data(res), si_f->state, si_b->state,
 		si_f->err_type, si_b->err_type,
 		si_b->conn_retries);