[MINOR] fix several printf formats and missing arguments

Last patch revealed a number of mistakes in printf-like calls, mostly int/long
mismatches, and a few missing arguments.
diff --git a/src/checks.c b/src/checks.c
index b48179a..216d2cb 100644
--- a/src/checks.c
+++ b/src/checks.c
@@ -221,7 +221,7 @@
 			" %d sessions requeued, %d total in queue.\n",
 			s->proxy->srv_act, s->proxy->srv_bck,
 			(s->proxy->srv_bck && !s->proxy->srv_act) ? " Running on backup." : "",
-			s->cur_sess, xferred, s->nbpend);
+			xferred, s->nbpend);
 
 		Warning("%s", trash);
 		send_log(s->proxy, LOG_NOTICE, "%s", trash);