Missing argument 2 for wpdb::prepare() in bordeaux_menu.php

Help me please;

Warning: Missing argument 2 for wpdb::prepare(), called in /home/fornode/public_html/wp-content/themes/alim_v2/functions/bordeaux_menu.php on line 5 and defined in /home/fornode/public_html/wp-includes/wp-db.php on line 1147

bordeaux_menu.php line 5

$count = $wpdb->get_var($wpdb->prepare(“SELECT COUNT(id) as Num FROM bordeaux_reservation WHERE approve=””));

wp-db.php line 1147

function prepare( $query, $args ) {
if ( is_null( $query ) )
return;

// This is not meant to be foolproof — but it will catch obviously incorrect usage.
if ( strpos( $query, ‘%’ ) === false ) {
_doing_it_wrong( ‘wpdb::prepare’, sprintf( __( ‘The query argument of %s must have a placeholder.’ ), ‘wpdb::prepare()’ ), ‘3.9’ );
}

$args = func_get_args();
array_shift( $args );
// If args were passed as an array (as in vsprintf), move them up
if ( isset( $args[0] ) && is_array($args[0]) )
$args = $args[0];
$query = str_replace( “‘%s'”, ‘%s’, $query ); // in case someone mistakenly already singlequoted it
$query = str_replace( ‘”%s”‘, ‘%s’, $query ); // doublequote unquoting
$query = preg_replace( ‘|(?<!%)%f|’ , ‘%F’, $query ); // Force floats to be locale unaware
$query = preg_replace( ‘|(?<!%)%s|’, “‘%s'”, $query ); // quote the strings, avoiding escaped strings like %%s
array_walk( $args, array( $this, ‘escape_by_ref’ ) );
return @vsprintf( $query, $args );
}
what’s wrong?