Qt, remove unnecessary headers

setHeaderHidden() was introduced in 4.4

modules/gui/qt4/components/complete_preferences.cpp

@@ -35,7 +35,6 @@
 #include <QScrollArea>
 #include <QVBoxLayout>
 #include <QGridLayout>
-#include <QHeaderView>
 
 #include "components/complete_preferences.hpp"
 #include "components/preferences_widgets.hpp"

modules/gui/qt4/components/info_panels.cpp

@@ -338,7 +338,7 @@ ExtraMetaPanel::ExtraMetaPanel( QWidget *parent,
      extraMetaTree->setAlternatingRowColors( true );
      extraMetaTree->setColumnCount( 2 );
      extraMetaTree->resizeColumnToContents( 0 );
-     extraMetaTree->header()->hide();
+     extraMetaTree->setHeaderHidden( true );
      layout->addWidget( extraMetaTree, 1, 0 );
 }
 
@@ -485,7 +485,7 @@ InputStatsPanel::InputStatsPanel( QWidget *parent,
 
      StatsTree = new QTreeWidget(this);
      StatsTree->setColumnCount( 3 );
-     StatsTree->header()->hide();
+     StatsTree->setHeaderHidden( true );
 
 #define CREATE_TREE_ITEM( itemName, itemText, itemValue, unit ) {              \
     itemName =                                                                 \

modules/gui/qt4/components/simple_preferences.cpp

@@ -887,7 +887,6 @@ void SPrefsPanel::changeStyle( QString s_style )
 
 #ifdef WIN32
 #include <QDialogButtonBox>
-#include <QHeaderView>
 #include "util/registry.hpp"
 #include <string>
 

modules/gui/qt4/dialogs/vlm.cpp

@@ -50,7 +50,6 @@
 #include <QDateTimeEdit>
 #include <QDateTime>
 #include <QSpinBox>
-#include <QHeaderView>
 #include <QScrollArea>
 #include <QFileDialog>