rem: return xmlNodeGetContent ( child_node );
add: return (gchar *) xmlNodeGetContent ( child_node );
context: gchar * child_content ( xmlNodePtr node, gchar * child_name ){  xmlNodePtr child_node;  if (!node) return NULL;  child_node = get_child ( node, child_name );  if ( child_node )    return xmlNodeGetContent ( child_node );    return NULL;}