add flag for when device is connected to a broker

protocol/rpt/device.cpp

@@ -30,6 +30,7 @@ namespace RDMnet::RPT {
  * @brief Device::Device
  */
 Device::Device()
+  : connectedToBroker(false)
 {
 
 }

protocol/rpt/device.h

@@ -32,6 +32,9 @@ class Device
 {
 public:
   Device();
+
+protected:
+  bool connectedToBroker; ///< True if the device is connected to a broker.
 };
 
 } // namespace RDMnet::RPT