Fix astate setting for combo parameters when setting all astate

Don't try to be smart when chosing which parameters need their
automation updated but rather trust the list that was populated at
creation time when all relevant information had been gathered.

gtk2_ardour/generic_pluginui.cc

@@ -987,9 +987,7 @@ void
 GenericPluginUI::set_all_automation (AutoState as)
 {
 	for (vector<ControlUI*>::iterator i = input_controls_with_automation.begin(); i != input_controls_with_automation.end(); ++i) {
-		if ((*i)->controller || (*i)->button) {
-			set_automation_state (as, (*i));
-		}
+		set_automation_state (as, (*i));
 	}
 }