Fixed core crash / Fixed error texture on shoot

core/src/io/anuke/mindustry/world/Block.java

@@ -164,6 +164,9 @@ public class Block extends BaseBlock {
     public void playerPlaced(Tile tile){
     }
 
+    public void removed(Tile tile){
+    }
+
     /** Called after the block is placed by anyone. */
     public void placed(Tile tile){
     }

core/src/io/anuke/mindustry/world/Tile.java

@@ -397,6 +397,7 @@ public class Tile implements PosTrait, TargetTrait{
 
     private void preChanged(){
         synchronized(tileSetLock){
+            block().removed(this);
             if(entity != null){
                 entity.removeFromProximity();
             }

core/src/io/anuke/mindustry/world/blocks/storage/CoreBlock.java

@@ -86,6 +86,11 @@ public class CoreBlock extends StorageBlock{
         return state.teams.get(tile.getTeam()).cores.size > 1;
     }
 
+    @Override
+    public void removed(Tile tile){
+        state.teams.get(tile.getTeam()).cores.removeValue(tile, true);
+    }
+
     @Override
     public void placed(Tile tile){
         state.teams.get(tile.getTeam()).cores.add(tile);
@@ -166,10 +171,8 @@ public class CoreBlock extends StorageBlock{
 
     @Override
     public void onDestroyed(Tile tile){
-        //TODO more dramatic effects
         super.onDestroyed(tile);
-
-        state.teams.get(tile.getTeam()).cores.removeValue(tile, true);
+        //TODO more dramatic effects
     }
 
     @Override