From 75384ccdc50f60f6c91109949b478f29f4597e19 Mon Sep 17 00:00:00 2001
From: Zlatin Balevsky <zlatinb@gmail.com>
Date: Thu, 5 Nov 2020 19:17:12 +0000
Subject: [PATCH] fix npe

---
 .../controllers/com/muwire/gui/MainFrameController.groovy     | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gui/griffon-app/controllers/com/muwire/gui/MainFrameController.groovy b/gui/griffon-app/controllers/com/muwire/gui/MainFrameController.groovy
index c2f9d348..acf5a459 100644
--- a/gui/griffon-app/controllers/com/muwire/gui/MainFrameController.groovy
+++ b/gui/griffon-app/controllers/com/muwire/gui/MainFrameController.groovy
@@ -718,7 +718,9 @@ class MainFrameController {
             JOptionPane.showMessageDialog(null, trans("CREATE_COLLECTION_MAX_FILES", Constants.COLLECTION_MAX_ITEMS, files.size()),
                 trans("CREATE_COLLECTION_MAX_FILES_TITLE"), JOptionPane.WARNING_MESSAGE)
             return
-        }        
+        }
+        if (files == null)
+            files = new ArrayList<>()        
         def params = [:]
         params['files'] = files
         params['spk'] = model.core.spk