Fix update checket error when there is no test version.

2 files changed, 4 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index 89dd9c8f1..d6eda2d91 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2018-03-24  Carl Hetherington  <cth@carlh.net>
 
+	* Fix update checker error when there is no test
+	version.
+
 	* Updated fr_FR translation from Thierry Journet.
 
 2018-03-22  Carl Hetherington  <cth@carlh.net>
diff --git a/src/lib/update_checker.cc b/src/lib/update_checker.cc
index 99060016f..6309caabe 100644
--- a/src/lib/update_checker.cc
+++ b/src/lib/update_checker.cc
@@ -161,7 +161,7 @@ UpdateChecker::thread ()
 				_stable = stable;
 			}
 
-			if (version_less_than (dcpomatic_version, test)) {
+			if (!test.empty() && version_less_than (dcpomatic_version, test)) {
 				_test = test;
 			}