Don't silence chr function arguments error

Hello Internals. I'd like to discuss a small change, but that demands a discussion, for a function in PHP's Core: https://php.net/chr <http://php.net/chr>. Currently, if you pass an argument that is not an integer, it will simply return an empty string: https://3v4l.org/FF2nA. In case you pass more than 1 argument, it will complain about "Wrong number of arguments": https://3v4l.org/Yrr43. The proposal of https://github.com/php/php-src/pull/4080 is to relly these checks to ZPP, making the first argument mandatory to an integer, and make the error message for extra arguments consistent with the rest of the core functions, e.g. "Warning: chr() expects parameter 1 to be int, string given". The idea is to merge in PHP-7.4, but if there's a consensus that this should go into PHP 8 only, so it is :) Best, -- Gabriel Caruso