Fix #10975: eregi_replace() is deprecated

eregi_replace() is deprecated in PHP 5.3.0 and should be replaced with
preg_replace instead (with the 'i' modifier for case insentive
matching).

core/print_api.php

@@ -188,7 +188,7 @@ function print_email_input( $p_field_name, $p_email ) {
 	if( $t_limit_email_domain ) {
 
 		# remove the domain part
-		$p_email = eregi_replace( "@$t_limit_email_domain$", '', $p_email );
+		$p_email = preg_replace( '/@' . preg_quote( $t_limit_email_domain, '/' ) . '$/i', '', $p_email );
 		echo '<input type="text" name="' . $p_field_name . '" size="20" maxlength="64" value="' . $p_email . '" />@' . $t_limit_email_domain;
 	} else {
 		echo '<input type="text" name="' . $p_field_name . '" size="32" maxlength="64" value="' . $p_email . '" />';