Fix nullpointer in RtfExporter

Change-Id: I15636c23be3a80eefc2ff6d4685d2f7fc697e1c4
diff --git a/Changes b/Changes
index cd9bc03..4a9fcdd 100644
--- a/Changes
+++ b/Changes
@@ -1,6 +1,7 @@
 0.2.4 2021-04-27
     - Fix temporary session-riding capabilities.
     - Introduced central tinylog.
+    - Fix nullpointer in RTF export.
 
 0.2.3 2021-03-24
     - Added trail info to RTF export.
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