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/common/http.cpp

@@ -251,16 +251,14 @@ bool wxHTTP::Connect(const wxString& host, unsigned short port)
     wxIPV4address *addr;
 
     if (m_addr) {
-        delete m_addr;
-        m_addr = NULL;
+        wxDELETE(m_addr);
         Close();
     }
 
     m_addr = addr = new wxIPV4address();
 
     if (!addr->Hostname(host)) {
-        delete m_addr;
-        m_addr = NULL;
+        wxDELETE(m_addr);
         m_lastError = wxPROTO_NETERR;
         return false;
     }