Avoid logging spurious warnings about ignored listeners that weren't

really ignored, but just never got responded to due to a bigger problem.
(The bigger problems are already logged.)


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3810 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/server/InvocationManager.java

@@ -280,6 +280,12 @@ public class InvocationManager
                         ", caller=" + source.who() + ", methId=" + methodId +
                         ", args=" + StringUtil.toString(args) + "].");
             Log.logStackTrace(t);
+
+            // avoid logging an error when the listener notices that it's
+            // been ignored.
+            if (rlist != null) {
+                rlist.setNoResponse();
+            }
         }
     }