fixing a bug with setting ranks for fuel efficiency

src/main/java/com/gmail/nossr50/datatypes/skills/SubSkillType.java

@@ -52,7 +52,6 @@ public enum SubSkillType {
     MINING_DEMOLITIONS_EXPERTISE(1),
     MINING_DOUBLE_DROPS,
     MINING_SUPER_BREAKER(1),
-    MINING_FUEL_EFFICIENCY(4),
 
     /* Repair */
     REPAIR_ARCANE_FORGING(8),
@@ -65,7 +64,7 @@ public enum SubSkillType {
 
     /* Smelting */
     SMELTING_FLUX_MINING(1),
-    SMELTING_FUEL_EFFICIENCY,
+    SMELTING_FUEL_EFFICIENCY(4),
     SMELTING_SECOND_SMELT,
     SMELTING_UNDERSTANDING_THE_ART(8),