Dont do diminishing returns on command caused xp gains Fixes #3312

src/main/java/com/gmail/nossr50/listeners/SelfListener.java

@@ -1,5 +1,6 @@
 package com.gmail.nossr50.listeners;
 
+import com.gmail.nossr50.datatypes.skills.XPGainReason;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
@@ -44,9 +45,10 @@ public class SelfListener implements Listener {
 
     @EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)
     public void onPlayerXpGain(McMMOPlayerXpGainEvent event) {
+        if (event.getXpGainReason() == XPGainReason.COMMAND)
+            return;
         SkillType skillType = event.getSkill();
         int threshold = ExperienceConfig.getInstance().getDiminishedReturnsThreshold(skillType);
-
         if (threshold <= 0 || !ExperienceConfig.getInstance().getDiminishedReturnsEnabled()) {
             // Diminished returns is turned off
             return;