[partition] Drop superfluous debug logging

- While here, update copyright header

src/modules/partition/gui/PartitionPage.cpp

@@ -2,7 +2,7 @@
  *
  *   Copyright 2014, Aurélien Gâteau <agateau@kde.org>
  *   Copyright 2015-2016, Teo Mrnjavac <teo@kde.org>
- *   Copyright 2018, Adriaan de Groot <groot@kde.org>
+ *   Copyright 2018-2019, Adriaan de Groot <groot@kde.org>
  *   Copyright 2018, Andrius Štikonas <andrius@stikonas.eu>
  *   Copyright 2018, Caio Jordão Carvalho <caiojcarvalho@gmail.com>
  *   Copyright 2019, Collabora Ltd
@@ -512,7 +512,8 @@ findBootloader( const QAbstractItemModel* model, const QString& path )
     for ( int i = 0; i < model->rowCount(); ++i)
     {
         const auto index = model->index( i, 0, QModelIndex() );
-        cDebug() << "FindBootLoader" << i << index.isValid() << model->itemData( index );
+        if ( !index.isValid() )
+            continue;
         QVariant var = model->data( index, BootLoaderModel::BootLoaderPathRole );
         if ( var.isValid() && var.toString() == path )
             return i;