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/html/htmlcell.cpp

@@ -237,8 +237,7 @@ bool wxHtmlCell::AdjustPagebreak(int *pagebreak,
 
 void wxHtmlCell::SetLink(const wxHtmlLinkInfo& link)
 {
-    if (m_Link) delete m_Link;
-    m_Link = NULL;
+    wxDELETE(m_Link);
     if (link.GetHref() != wxEmptyString)
         m_Link = new wxHtmlLinkInfo(link);
 }