From a18df41e49ebfd4dc82e6569d82596aa7f31eea8 Mon Sep 17 00:00:00 2001
From: Glenn Maynard <glenn@steprevolution.com>
Date: Thu, 8 Nov 2018 19:11:51 -0600
Subject: [PATCH] Fix calls to ActivePads() causing exceptions in design mode.

---
 smx-config/Helpers.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/smx-config/Helpers.cs b/smx-config/Helpers.cs
index e36f1d9..c8810ec 100644
--- a/smx-config/Helpers.cs
+++ b/smx-config/Helpers.cs
@@ -25,6 +25,10 @@ namespace smx_config
         // A shortcut for when a LoadFromConfigDelegateArgs isn't available:
         public static IEnumerable<Tuple<int, SMX.SMXConfig>> ActivePads()
         {
+            // In case we're called in design mode, just return an empty list.
+            if(CurrentSMXDevice.singleton == null)
+                return new List<Tuple<int, SMX.SMXConfig>>();
+
             return ActivePads(CurrentSMXDevice.singleton.GetState());
         }