From 9fc48ac8bd1c26a70810a9cc59b4c0b7e6f903ec Mon Sep 17 00:00:00 2001
From: Taka <taka@vm-linux-dev>
Date: Sat, 13 Apr 2019 03:45:00 +0000
Subject: [PATCH] Fixed a possible crash at startup.

---
 vasl_templates/webapp/vassal.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/vasl_templates/webapp/vassal.py b/vasl_templates/webapp/vassal.py
index 09ef9d6..3e13a1b 100644
--- a/vasl_templates/webapp/vassal.py
+++ b/vasl_templates/webapp/vassal.py
@@ -350,10 +350,11 @@ class VassalShim:
             return
         version = VassalShim().get_version()
         if version not in SUPPORTED_VASSAL_VERSIONS:
-            msg_store.warning(
-                "This program has not been tested with VASSAL {}." \
-                "<p>Things might work, but they might not...".format( version )
-            )
+            if msg_store:
+                msg_store.warning(
+                    "This program has not been tested with VASSAL {}." \
+                    "<p>Things might work, but they might not...".format( version )
+                )
 
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