unit payload improvements

core/src/mindustry/world/blocks/distribution/PayloadConveyor.java

@@ -234,6 +234,18 @@ public class PayloadConveyor extends Block{
             updatePayload();
         }
 
+        @Override
+        public void onDestroyed() {
+            super.onDestroyed();
+            if (item != null) item.dump();
+        }
+
+        @Override
+        public void onRemoved() {
+            super.onRemoved();
+            if (item != null) item.dump();
+        }
+
         @Override
         public void write(Writes write){
             super.write(write);

core/src/mindustry/world/blocks/production/PayloadAcceptor.java

@@ -82,6 +82,18 @@ public class PayloadAcceptor extends Block{
             return t;
         }
 
+        @Override
+        public void onDestroyed() {
+            super.onDestroyed();
+            if (payload != null) payload.dump();
+        }
+
+        @Override
+        public void onRemoved() {
+            super.onRemoved();
+            if (payload != null) payload.dump();
+        }
+
         public boolean blends(int direction){
             return PayloadAcceptor.blends(this, direction);
         }
@@ -126,6 +138,7 @@ public class PayloadAcceptor extends Block{
             }
         }
 
+
         public void dumpPayload(){
             if(payload.dump()){
                 payload = null;