Build ModWFM tx channel server plugin and apply corrections to other server plugins

plugins/channeltx/modam/ammodplugin.cpp

@@ -15,10 +15,11 @@
 ///////////////////////////////////////////////////////////////////////////////////
 
 #include <QtPlugin>
-#include <QAction>
 #include "plugin/pluginapi.h"
 
+#ifndef SERVER_MODE
 #include "ammodgui.h"
+#endif
 #include "ammod.h"
 #include "ammodplugin.h"
 
@@ -50,10 +51,19 @@ void AMModPlugin::initPlugin(PluginAPI* pluginAPI)
 	m_pluginAPI->registerTxChannel(AMMod::m_channelIdURI, AMMod::m_channelId, this);
 }
 
+#ifdef SERVER_MODE
+PluginInstanceGUI* AMModPlugin::createTxChannelGUI(
+        DeviceUISet *deviceUISet __attribute__((unused)),
+        BasebandSampleSource *txChannel __attribute__((unused)))
+{
+    return 0;
+}
+#else
 PluginInstanceGUI* AMModPlugin::createTxChannelGUI(DeviceUISet *deviceUISet, BasebandSampleSource *txChannel)
 {
 	return AMModGUI::create(m_pluginAPI, deviceUISet, txChannel);
 }
+#endif
 
 BasebandSampleSource* AMModPlugin::createTxChannelBS(DeviceSinkAPI *deviceAPI)
 {