Qt: missing includes

modules/gui/qt4/dialogs/external.cpp

@@ -35,6 +35,7 @@
 #include <QMessageBox>
 #include <QProgressDialog>
 #include <QMutex>
+#include <QPushButton>
 
 DialogHandler::DialogHandler (intf_thread_t *intf, QObject *_parent)
     : QObject( _parent ), intf (intf),

modules/gui/qt4/dialogs/gototime.cpp

@@ -33,6 +33,7 @@
 #include <QTimeEdit>
 #include <QGroupBox>
 #include <QDialogButtonBox>
+#include <QPushButton>
 
 GotoTimeDialog::GotoTimeDialog( intf_thread_t *_p_intf)
                : QVLCDialog( (QWidget*)_p_intf->p_sys->p_mi, _p_intf )

modules/gui/qt4/dialogs/help.cpp

@@ -44,6 +44,7 @@
 #include <QEvent>
 #include <QFileDialog>
 #include <QDate>
+#include <QPushButton>
 
 #include <assert.h>
 

modules/gui/qt4/dialogs/mediainfo.cpp

@@ -33,6 +33,7 @@
 #include <QGridLayout>
 #include <QLineEdit>
 #include <QLabel>
+#include <QPushButton>
 
 /* This Dialog has two main modes:
     - General Mode that shows the current Played item, and the stats

modules/gui/qt4/dialogs/messages.cpp

@@ -39,6 +39,7 @@
 #include <QHeaderView>
 #include <QMutex>
 #include <QLineEdit>
+#include <QPushButton>
 
 #include <assert.h>