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.cpp

@@ -70,7 +70,7 @@ IMPLEMENT_REFLECTION(SymbolFont) {
 // ----------------------------------------------------------------------------- : SymbolInFont
 
 /// A symbol in a symbol font
-class SymbolInFont {
+class SymbolInFont : public IntrusivePtrBase<SymbolInFont> {
   public:
 	SymbolInFont();