list.size > 0 changed to !list.isEmpty

We care about if it's empty or not, not about it's size

Mage/src/main/java/mage/game/combat/Combat.java

@@ -514,7 +514,7 @@ public class Combat implements Serializable, Copyable<Combat> {
                     }
                 }
                 if (attackerExists) {
-                    if (group.getBlockers().size() > 0) {
+                    if (!group.getBlockers().isEmpty()) {
                         sb.append("blocked by ");
                         for (UUID blockingCreatureId : group.getBlockerOrder()) {
                             Permanent blockingCreature = game.getPermanent(blockingCreatureId);