Fix for issue #11: in introspection do not create method twice

src/tools/dbusxml2qt3/methodgen.cpp

@@ -1721,6 +1721,12 @@ void MethodGenerator::writeIntrospectionDataMethod(const Class& classData,
     TQValueList<Method>::const_iterator endIt = classData.methods.end();
     for (; it != endIt; ++it)
     {
+	// prevent creating method twice in introspection when method is async
+	// TODO: how to add annotation
+	// 	 <annotation name="org.freedesktop.DBus.GLib.Async"/>
+	// to such method if we skip it
+	if ((*it).async) continue;
+
         if (firstMethod)
         {
             firstMethod = false;