Clear contents of account custom params before re-reading configs.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@16400 d0543943-73ff-0310-b7d9-9358b9ac24b2

fscomm/preferences/accountdialog.cpp

@@ -81,6 +81,7 @@ void AccountDialog::readConfig()
 
     _settings->beginGroup("gateway/customParams");
     int row = 0;
+    ui->sofiaExtraParamTable->clearContents();
     foreach(QString k, _settings->childKeys())
     {
         row++;