Use wxDELETE() and wxDELETEA() when possible.

Use wxDELETE[A]() functions which automatically NULL out their arguments after
deleting them instead of doing it manually.

Closes #9685.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64656 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/os2/toolbar.cpp

@@ -423,11 +423,7 @@ bool wxToolBar::Create( wxWindow* pParent,
 
 wxToolBar::~wxToolBar()
 {
-    if (m_pToolTip)
-    {
-        delete m_pToolTip;
-        m_pToolTip = NULL;
-    }
+    wxDELETE(m_pToolTip);
 } // end of wxToolBar::~wxToolBar
 
 bool wxToolBar::Realize()