g_list_free swigged GList* arguments

used by xaccQueryAddAccountMatch and gnc_price_list_equal. SplitList
TransList LotList and CommodityList are not currently being passed as
arguments.

bindings/engine.i

@@ -67,7 +67,6 @@ GLIST_HELPER_INOUT(TransList, SWIGTYPE_p_Transaction);
 GLIST_HELPER_INOUT(LotList, SWIGTYPE_p_GNCLot);
 GLIST_HELPER_INOUT(AccountList, SWIGTYPE_p_Account);
 GLIST_HELPER_INOUT(PriceList, SWIGTYPE_p_GNCPrice);
-// TODO: free PriceList?
 GLIST_HELPER_INOUT(CommodityList, SWIGTYPE_p_gnc_commodity);
 
 %typemap(newfree) gchar * "g_free($1);"
@@ -103,6 +102,13 @@ static const GncGUID * gncBudgetGetGUID(GncBudget *x)
 { return qof_instance_get_guid(QOF_INSTANCE(x)); }
 %}
 
+%typemap (freearg) AccountList * "g_list_free ($1);"
+%typemap (freearg) PriceList * "g_list_free ($1);"
+%typemap (freearg) SplitList * "g_list_free ($1);"
+%typemap (freearg) TransList * "g_list_free ($1);"
+%typemap (freearg) LotList * "g_list_free ($1);"
+%typemap (freearg) CommodityList * "g_list_free ($1);"
+
 /* NB: The object ownership annotations should already cover all the
 functions currently used in guile, but not all the functions that are
 wrapped.  So, we should contract the interface to wrap only the used