BETA: Fixed `SkillData#getMaxLevel` method it was returning a random value since it was not getting computed correctly.

Patch by: d!g0
Reviewed by: St3eT, Zoey76, xban1x

L2J_Server_BETA/java/com/l2jserver/gameserver/datatables/SkillData.java

@@ -75,7 +75,7 @@ public final class SkillData
 			
 			// only non-enchanted skills
 			final int maxLvl = getMaxLevel(skillId);
-			if ((maxLvl > 0) || (skillLvl > maxLvl))
+			if (skillLvl > maxLvl)
 			{
 				_skillMaxLevel.put(skillId, skillLvl);
 			}