Ensure the frequencies list is initialized when the program is started without a WSJT-X.ini file.

Configuration.cpp

@@ -1637,6 +1637,10 @@ void Configuration::impl::read_settings ()
               frequencies_.reset_to_defaults();
             }
         }
+      else
+        {
+          frequencies_.reset_to_defaults();
+        }
     }
 
   stations_.station_list (settings_->value ("stations").value<StationList::Stations> ());