PHP throws an error because spip_num_rows is not defined if spip_query has not been called yet.

ecrire/inc/meta.php

@@ -33,7 +33,8 @@ function ecrire_meta($nom, $valeur, $importable = NULL) {
 		if (!_FILE_CONNECT && !@file_exists(_FILE_CONNECT_INS .'.php')) return;
 		// conserver la valeur de impt si existante
 		if ($importable === NULL){
-			if (@spip_num_rows(spip_query("SELECT * FROM spip_meta WHERE nom="._q($nom))))
+			$res = spip_query("SELECT * FROM spip_meta WHERE nom="._q($nom));
+			if (@spip_num_rows($res))
 				spip_query("UPDATE spip_meta SET valeur=" . _q($valeur) . " WHERE nom="._q($nom));
 			else
 				spip_query("INSERT spip_meta (nom, valeur) VALUES ("._q($nom).", " . _q($valeur) . ")");