Fix compiler warnings

plugins/feature/map/beacon.h

@@ -130,7 +130,6 @@ struct Beacon {
                 // Read data
                 while (fgets(row, sizeof(row), file))
                 {
-                    int id = 0;
                     char *callsign = nullptr;
                     size_t callsignLen = 0;
                     char *frequencyString = nullptr;

plugins/feature/map/mapgui.cpp

@@ -543,7 +543,7 @@ void MapGUI::applySettings(bool force)
     }
 }
 
-void MapGUI::on_maidenhead_clicked(bool checked)
+void MapGUI::on_maidenhead_clicked()
 {
     MapMaidenheadDialog dialog;
     dialog.exec();

plugins/feature/map/mapgui.h

@@ -365,7 +365,7 @@ private slots:
     void handleInputMessages();
     void on_displayNames_clicked(bool checked=false);
     void on_find_returnPressed();
-    void on_maidenhead_clicked(bool checked=false);
+    void on_maidenhead_clicked();
     void on_deleteAll_clicked();
     void on_displaySettings_clicked();
     void on_mapTypes_currentIndexChanged(int index);