fix test segfault

whe XMLTree goes out of scope, the root-node is deleted

diff --git a/libs/ardour/test/test_util.cc b/libs/ardour/test/test_util.cc
index 3c60329170416579acd097a777587eec6a7ee553..4d19385f3ce0cb12f968502138b63dc953dfa28b 100644 (file)
--- a/libs/ardour/test/test_util.cc
+++ b/libs/ardour/test/test_util.cc
@@ -92,7 +92,9 @@ write_ref (XMLNode* node, string ref_file)
 {
        XMLTree ref;
        ref.set_root (node);
-       return ref.write (ref_file);
+       bool rv = ref.write (ref_file);
+       ref.set_root (0);
+       return rv;
 }
 
 class TestReceiver : public Receiver