merge post-1.3.0 fixes
diff --git a/archival/libunarchive/get_header_tar.c b/archival/libunarchive/get_header_tar.c
index beb8687..622f09f 100644
--- a/archival/libunarchive/get_header_tar.c
+++ b/archival/libunarchive/get_header_tar.c
@@ -74,8 +74,10 @@
 
 	if (sizeof(tar) != 512)
 		BUG_tar_header_size();
- again:
 
+#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
+ again:
+#endif
 	/* Align header */
 	data_align(archive_handle, 512);