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/event.cpp

@@ -887,8 +887,7 @@ void wxEventHashTable::Clear()
         delete eTTnode;
     }
 
-    delete[] m_eventTypeTable;
-    m_eventTypeTable = NULL;
+    wxDELETEA(m_eventTypeTable);
 
     m_size = 0;
 }