Doc: sync lobj.sgml's copy of testlo.c with the latter file.

Zhijie Hou

Discussion: https://postgr.es/m/ce2cd951fe9b448a9cda99dc1a871fb9@G08CNEXMBPEKD05.g08.fujitsu.local

doc/src/sgml/lobj.sgml

@@ -901,8 +901,6 @@ exportFile(PGconn *conn, Oid lobjId, char *filename)
 
     lo_close(conn, lobj_fd);
     close(fd);
-
-    return;
 }
 
 static void