Bugfix: CombatDamageStack now accepts values from other sources than itself

Author: hydrozoa-yt

src/main/java/io/luna/game/model/mob/combat/CombatDamageStack.java

@@ -48,7 +48,7 @@ public CombatDamageStack(Mob mob) {
      * @param damage The damage entry to buffer.
      */
     public void push(Mob source, CombatDamage damage) {
-        if (mob.equals(source)) {
+        if (!mob.equals(source)) {
             buffer.put(source, damage);
         }
     }