Implement version setting in SlXvSetCurrentState

Call in ClearSaveLoadState

src/saveload/extended_ver_sl.cpp

@@ -108,7 +108,10 @@ void SlXvSetCurrentState()
 	SlXvResetState();
 	_sl_is_ext_version = true;
 
-	// TODO: set versions for currently enabled features here
+	const SlxiSubChunkInfo *info = _sl_xv_sub_chunk_infos;
+	for (; info->index != XSLFI_NULL; ++info) {
+		_sl_xv_feature_versions[info->index] = info->save_version;
+	}
 }
 
 /**

src/saveload/saveload.cpp

@@ -2467,6 +2467,8 @@ static inline void ClearSaveLoadState()
 
 	delete _sl.lf;
 	_sl.lf = NULL;
+
+	SlXvSetCurrentState();
 }
 
 /**