cleanup: use primitive type instead of wrapper type

src/main/java/server/maps/MapleMap.java

@@ -447,7 +447,7 @@ public class MapleMap {
     private int getUsableOID() {
         objectRLock.lock();
         try {
-            Integer curOid;
+            int curOid;
             
             // clashes with playernpc on curOid >= 2147000000, developernpc uses >= 2147483000
             do {

src/main/java/server/partyquest/AriantColiseum.java

@@ -220,7 +220,7 @@ public class AriantColiseum {
     }
     
     public void distributeAriantPoints() {
-        Integer firstTop = -1, secondTop = -1;
+        int firstTop = -1, secondTop = -1;
         MapleCharacter winner = null;
         List<Integer> runnerups = new ArrayList<>();