added missing source types

src/engine/mbEnums.java

@@ -1018,7 +1018,8 @@ public class mbEnums {
         ManaRecoverRate,
         StaminaRecoverRate,
         MeleeDamageModifier,
-        PowerDamageModifier;
+        PowerDamageModifier,
+        Attr;
 
         public static SourceType GetSourceType(String modName) {
             SourceType returnMod;