rem: return ( operation );
add: return ( transaction );
context: struct structure_operation *cherche_operation_from_ligne ( gint ligne,							   gint no_account ){    GtkTreeIter iter;    struct structure_operation *operation;    GtkTreeModel *model;    model = gsb_account_get_store ( no_account );    if ( !gtk_tree_model_get_iter_from_string (GTK_TREE_MODEL ( model ),					       &iter,					       itoa (ligne)))	return NULL;    gtk_tree_model_get ( GTK_TREE_MODEL ( model ),			 &iter,			 9, &operation,			 -1 );    return ( operation );}