server-php: Correction of error-code in ErrorHandler (#491)
server-php: Correction of error-code in ErrorHandler (#491)

`APIResponse::ErrorHandler` would in case of type `E_CORE_ERROR` return type `E_COMPILE_ERROR` and in case of type `E_CORE_WARNING` return type `E_COMPILE_WARNING`.
Rxswyers/OS.js,Rxswyers/OS.js,andersevenrud/OS.js-v2,Rxswyers/OS.js,Rxswyers/OS.js,andersevenrud/OS.js-v2,andersevenrud/OS.js-v2,Rxswyers/OS.js,andersevenrud/OS.js-v2,andersevenrud/OS.js-v2