Is empty is better than checking is the size is 0

Author: ColinHebert

src/main/java/org/fluentd/logger/sender/ConstantDelayReconnector.java

@@ -43,6 +43,6 @@ public void clearErrorHistory() {
     }
 
     public boolean enableReconnection(long timestamp) {
-        return errorHistory.size() == 0 || timestamp - errorHistory.getLast() >= wait;
+        return errorHistory.isEmpty() || timestamp - errorHistory.getLast() >= wait;
     }
 }