Reset events for debug

src/main/java/com/gmail/nossr50/util/metrics/MetricsManager.java

@@ -249,5 +249,7 @@ public class MetricsManager {
 
             System.out.println("Graph: " + graphName + ", Column: " + colName + ", Value: " + value);
         }
+
+        tracker.resetEvents();
     }
 }