HelpWidget: Use member initialization

Change-Id: I734fa9bb1bd5a0518a6051b9001f61f722c90691
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/help/helpwidget.cpp

@@ -69,21 +69,7 @@ namespace Internal {
 
 HelpWidget::HelpWidget(const Core::Context &context, WidgetStyle style, QWidget *parent) :
     QWidget(parent),
-    m_style(style),
-    m_toggleSideBarAction(0),
-    m_switchToHelp(0),
-    m_filterComboBox(0),
-    m_closeAction(0),
-    m_scaleUp(0),
-    m_scaleDown(0),
-    m_resetScale(0),
-    m_printer(0),
-    m_sideBar(0),
-    m_contentsAction(0),
-    m_indexAction(0),
-    m_bookmarkAction(0),
-    m_searchAction(0),
-    m_openPagesAction(0)
+    m_style(style)
 {
     m_viewerStack = new QStackedWidget;