Varargified log calls.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5697 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/net/PongResponse.java

@@ -92,8 +92,8 @@ public class PongResponse extends DownstreamMessage
 
         // the time spent between unpacking the ping and packing the pong is the processing delay
         if (_pingStamp == 0L) {
-            log.warning("Pong response written that was not constructed " +
-                        "with a valid ping stamp [rsp=" + this + "].");
+            log.warning("Pong response written that was not constructed with a valid ping stamp",
+                        "rsp", this);
             _processDelay = 0;
         } else {
             _processDelay = (int)(_packStamp - _pingStamp);