Make DeviceUISet and DeviceSet classes as they are forward declared like this

sdrgui/device/deviceuiset.h

@@ -32,8 +32,9 @@ class DeviceSinkAPI;
 class ChannelMarker;
 class PluginAPI;
 
-struct DeviceUISet
+class DeviceUISet
 {
+public:
     SpectrumVis *m_spectrumVis;
     GLSpectrum *m_spectrum;
     GLSpectrumGUI *m_spectrumGUI;

sdrsrv/device/deviceset.cpp

@@ -295,7 +295,7 @@ void DeviceSet::loadTxChannelSettings(const Preset *preset, PluginAPI *pluginAPI
         // everything, that is still "available" is not needed anymore
         for(int i = 0; i < openChannels.count(); i++)
         {
-            qDebug("DeviceUISet::loadChannelSettings: destroying spare channel [%s]", qPrintable(openChannels[i].m_channelName));
+            qDebug("DeviceSet::loadChannelSettings: destroying spare channel [%s]", qPrintable(openChannels[i].m_channelName));
             openChannels[i].m_channelSourceAPI->destroy();
         }
 

sdrsrv/device/deviceset.h

@@ -28,8 +28,9 @@ class ChannelSinkAPI;
 class ChannelSourceAPI;
 class Preset;
 
-struct DeviceSet
+class DeviceSet
 {
+public:
     DSPDeviceSourceEngine *m_deviceSourceEngine;
     DeviceSourceAPI *m_deviceSourceAPI;
     DSPDeviceSinkEngine *m_deviceSinkEngine;