BUG: connection: fix typo in previous commit

A typo broke the logs (obj_type() instead of objt_server()).
diff --git a/src/log.c b/src/log.c
index 06a2a57..24273a5 100644
--- a/src/log.c
+++ b/src/log.c
@@ -1175,7 +1175,7 @@
 				break;
 
 			case LOG_FMT_SRVCONN:  // %sc
-				ret = ultoa_o(obj_type(s->target) ?
+				ret = ultoa_o(objt_server(s->target) ?
 				                 objt_server(s->target)->cur_sess :
 				                 0, tmplog, dst + maxsize - tmplog);
 				if (ret == NULL)