rem: if ( ! ope -> categ )
add: if ( ! ope -> categ || ! strlen ( string ) )
context: gboolean csv_import_parse_sub_category ( struct struct_ope_importation * ope, gchar * string ){    g_return_if_fail ( string );    if ( ! ope -> categ )	return FALSE;    ope -> categ = g_strconcat ( ope -> categ, " : ", string, NULL );    return TRUE;}