Added backwards compatibility for legacy saves

core/src/mindustry/io/legacy/Save3.java

@@ -0,0 +1,29 @@
+package mindustry.io.legacy;
+
+import mindustry.game.*;
+import mindustry.game.Teams.*;
+
+import java.io.*;
+
+import static mindustry.Vars.content;
+
+public class Save3 extends LegacySaveVersion{
+    public Save3(){
+        super(3);
+    }
+
+    @Override
+    public void readEntities(DataInput stream) throws IOException{
+        int teamc = stream.readInt();
+        for(int i = 0; i < teamc; i++){
+            Team team = Team.get(stream.readInt());
+            TeamData data = team.data();
+            int blocks = stream.readInt();
+            for(int j = 0; j < blocks; j++){
+                data.brokenBlocks.addLast(new BrokenBlock(stream.readShort(), stream.readShort(), stream.readShort(), content.block(stream.readShort()).id, stream.readInt()));
+            }
+        }
+
+        readLegacyEntities(stream);
+    }
+}