Fix Member variable m_pView is not initialized in the constructor

Change-Id: I0b18698f23f7c2c446e60069d0efcb6d89b1e5d3

forms/source/richtext/richtextviewport.cxx

@@ -31,6 +31,7 @@ namespace frm
     //--------------------------------------------------------------------
     RichTextViewPort::RichTextViewPort( Window* _pParent )
         :Control ( _pParent )
+        ,m_pView(NULL)
         ,m_bHideInactiveSelection( true )
     {
     }