Generator fixes

core/src/io/anuke/mindustry/content/Blocks.java

@@ -1045,7 +1045,7 @@ public class Blocks implements ContentList{
             size = 2;
         }};
 
-        differentialGenerator = new ItemLiquidGenerator(true, true, "differential-generator"){{
+        differentialGenerator = new SingleTypeGenerator(true, false, "differential-generator"){{
             requirements(Category.power, ItemStack.with(Items.copper, 140, Items.titanium, 100, Items.lead, 200, Items.silicon, 130, Items.metaglass, 100));
             powerProduction = 16f;
             itemDuration = 50f;

core/src/io/anuke/mindustry/content/Mechs.java

@@ -50,7 +50,7 @@ public class Mechs implements ContentList{
 
             @Override
             public void updateAlt(Player player){
-                player.healBy(Time.delta() * 0.4f);
+                player.healBy(Time.delta() * 0.1f);
             }
 
             @Override

core/src/io/anuke/mindustry/world/blocks/power/ItemLiquidGenerator.java

@@ -79,6 +79,11 @@ public class ItemLiquidGenerator extends PowerGenerator{
         //Power amount is delta'd by PowerGraph class already.
         float calculationDelta = entity.delta();
 
+        if(!entity.cons.valid()){
+            entity.productionEfficiency = 0.0f;
+            return;
+        }
+
         Liquid liquid = null;
         for(Liquid other : content.liquids()){
             if(hasLiquids && entity.liquids.get(other) >= 0.001f && getLiquidEfficiency(other) >= minLiquidEfficiency){

core/src/io/anuke/mindustry/world/blocks/power/SingleTypeGenerator.java

@@ -0,0 +1,20 @@
+package io.anuke.mindustry.world.blocks.power;
+
+import io.anuke.mindustry.type.Item;
+import io.anuke.mindustry.type.Liquid;
+
+public class SingleTypeGenerator extends ItemLiquidGenerator{
+    public SingleTypeGenerator(boolean hasItems, boolean hasLiquids, String name){
+        super(hasItems, hasLiquids, name);
+    }
+
+    @Override
+    protected float getItemEfficiency(Item item){
+        return 1f;
+    }
+
+    @Override
+    protected float getLiquidEfficiency(Liquid liquid){
+        return 0f;
+    }
+}