Crash fix

core/src/mindustry/entities/units/AIController.java

@@ -217,6 +217,7 @@ public class AIController implements UnitController{
         return target(x, y, range, air, ground);
     }
 
+    /** Called after this controller is assigned a unit. */
     public void init(){
 
     }

core/src/mindustry/world/consumers/ConsumeLiquidFilter.java

@@ -42,7 +42,10 @@ public class ConsumeLiquidFilter extends ConsumeLiquidBase{
 
     @Override
     public void update(Building build){
-        build.liquids.remove(getConsumed(build), amount * build.edelta());
+        Liquid liq = getConsumed(build);
+        if(liq != null){
+            build.liquids.remove(liq, amount * build.edelta());
+        }
     }
 
     @Override