From d6c6c7515716e3771d990158e1d2e69245c4c181 Mon Sep 17 00:00:00 2001
From: Glitchfinder <glitchkey@gmail.com>
Date: Wed, 30 Oct 2013 15:49:47 -0700
Subject: [PATCH] Experience is occasionally zero or cast to zero.

Fixes #1575 and fixes #1576
---
 .../com/gmail/nossr50/datatypes/player/McMMOPlayer.java     | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/gmail/nossr50/datatypes/player/McMMOPlayer.java b/src/main/java/com/gmail/nossr50/datatypes/player/McMMOPlayer.java
index 39f7989ec..53b06f7a8 100644
--- a/src/main/java/com/gmail/nossr50/datatypes/player/McMMOPlayer.java
+++ b/src/main/java/com/gmail/nossr50/datatypes/player/McMMOPlayer.java
@@ -468,7 +468,11 @@ public class McMMOPlayer {
      * @param xp Experience amount to process
      */
     public void beginXpGain(SkillType skill, float xp) {
-        Validate.isTrue(xp > 0, "XP gained should be greater than zero.");
+        Validate.isTrue(xp >= 0.0, "XP gained should be greater than or equal to zero.");
+
+        if (xp <= 0.0) {
+            return;
+		}
 
         if (skill.isChildSkill()) {
             Set<SkillType> parentSkills = FamilyTree.getParents(skill);