Correct tag name for writing and add compatibilty for created corrupt schematics

worldedit-core/src/main/java/com/sk89q/worldedit/extent/clipboard/io/FastSchematicReader.java

@@ -157,6 +157,10 @@ public class FastSchematicReader extends NBTSchematicReader {
         tilesDelegate.withInfo((length, type) -> tiles = new ArrayList<>(length));
         tilesDelegate.withElem((ValueReader<Map<String, Object>>) (index, tile) -> tiles.add(tile));
 
+        StreamDelegate compatTilesDelegate = schematic.add("TileEntities");
+        compatTilesDelegate.withInfo((length, type) -> tiles = new ArrayList<>(length));
+        compatTilesDelegate.withElem((ValueReader<Map<String, Object>>) (index, tile) -> tiles.add(tile));
+
         StreamDelegate entitiesDelegate = schematic.add("Entities");
         entitiesDelegate.withInfo((length, type) -> entities = new ArrayList<>(length));
         entitiesDelegate.withElem((ValueReader<Map<String, Object>>) (index, entity) -> entities.add(entity));

worldedit-core/src/main/java/com/sk89q/worldedit/extent/clipboard/io/FastSchematicWriter.java

@@ -210,14 +210,14 @@ public class FastSchematicWriter implements ClipboardWriter {
             }
 
             if (numTiles != 0) {
-                out.writeNamedTagName("TileEntities", NBTConstants.TYPE_LIST);
+                out.writeNamedTagName("BlockEntities", NBTConstants.TYPE_LIST);
                 rawStream.write(NBTConstants.TYPE_COMPOUND);
                 rawStream.writeInt(numTiles);
                 try (LZ4BlockInputStream in = new LZ4BlockInputStream(new ByteArrayInputStream(tilesCompressed.toByteArray()))) {
                     IOUtil.copy(in, rawStream);
                 }
             } else {
-                out.writeNamedEmptyList("TileEntities");
+                out.writeNamedEmptyList("BlockEntities");
             }
 
             if (finalClipboard.hasBiomes()) {