Add busy lockout to remote mode handling.

DMRControl.cpp

@@ -1,5 +1,5 @@
 /*
- *	Copyright (C) 2015,2016,2017,2018 Jonathan Naylor, G4KLX
+ *	Copyright (C) 2015-2019 Jonathan Naylor, G4KLX
  *
  *	This program is free software; you can redistribute it and/or modify
  *	it under the terms of the GNU General Public License as published by
@@ -122,3 +122,11 @@ void CDMRControl::clock()
 	m_slot1.clock();
 	m_slot2.clock();
 }
+
+bool CDMRControl::isBusy() const
+{
+	if (m_slot1.isBusy())
+		return true;
+
+	return m_slot2.isBusy();
+}