Fixes bug #8748 (Ethiliel not showing up in TSG->Vengeance)

and lets cross fingers i didn't break anything else.

changelog

@@ -111,6 +111,7 @@ Version 1.3.1+svn:
      a high or negative amount of hitpoints (bug #6154, bug #7955, bug #8541) 
      -1 hitpoints will still cause a crash.
    * fix skirmisher filtered by terrain not working properly.
+   * fixed Ethiliel not showing up in the scenario "Vengeance" of TSG
 
 Version 1.3.1:
  * Campaignd

src/config_adapter.cpp

@@ -143,7 +143,7 @@ void get_player_info(const config& cfg, game_state& gamestate, std::string save_
 
 	//if there are additional starting units on this side
 	const config::child_list& starting_units = cfg.get_children("unit");
-	if ( (starting_units.begin() != starting_units.end()) && (player) ){
+	if ( (starting_units.begin() != starting_units.end()) && player && (gamestate.version < "1.2.2") ){
 		player->available_units.clear();
 	}
 	for(config::child_list::const_iterator su = starting_units.begin(); su != starting_units.end(); ++su) {