Fixed core deconstruction crash

core/src/io/anuke/mindustry/entities/bullet/Bullet.java

@@ -109,6 +109,10 @@ public class Bullet extends BulletEntity<BulletType> implements TeamTrait, SyncT
         remove();
     }
 
+    public BulletType getBulletType(){
+        return type;
+    }
+
     public void resetOwner(Entity entity, Team team){
         this.owner = entity;
         this.team = team;

core/src/io/anuke/mindustry/entities/traits/BuilderTrait.java

@@ -181,12 +181,7 @@ public interface BuilderTrait extends Entity{
             setMineTile(null);
         }
 
-        TileEntity core = unit.getClosestCore();
 
-        //if there is no core to build with, stop building!
-        if(core == null){
-            return;
-        }
 
         Tile tile = world.tile(current.x, current.y);
 
@@ -205,6 +200,13 @@ public interface BuilderTrait extends Entity{
             }
         }
 
+        TileEntity core = unit.getClosestCore();
+
+        //if there is no core to build with, stop building!
+        if(core == null){
+            return;
+        }
+
         //otherwise, update it.
         BuildEntity entity = tile.entity();