Remove unnecessary NULL

Z_PARAM_FUNC already does this.

Author: trowski

ext/standard/basic_functions.c

@@ -1793,7 +1793,6 @@ PHP_FUNCTION(register_shutdown_function)
 	ZEND_PARSE_PARAMETERS_END();
 
 	Z_TRY_ADDREF(entry.fci.function_name);
-	entry.fci.params = NULL;
 	zend_fcall_info_argp(&entry.fci, param_count, params);
 
 	status = append_user_shutdown_function(&entry);