HelpPlugin: Modernize

modernize-use-*

Change-Id: Ie0058675c1336377326089dbc093436130f1fe03
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/help/helpviewer.h

@@ -111,7 +111,7 @@ protected:
 
     void restoreOverrideCursor();
 
-    Actions m_visibleActions = 0;
+    Actions m_visibleActions;
     int m_loadOverrideStack = 0;
 };