default smart pointer type switched to intrusive_ptr

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@337 0fc631ac-6414-0410-93d0-97cfa31319b6

src/data/symbol_font.hpp

@@ -111,7 +111,7 @@ enum MenuItemType
 };
 
 /// Description of a menu to insert symbols from a symbol font into the text
-class InsertSymbolMenu {
+class InsertSymbolMenu : public IntrusivePtrBase<InsertSymbolMenu> {
   public:
 	InsertSymbolMenu();