A couple of minor PHP 8 fixes that can be applied now

include/common.inc.php

@@ -17,7 +17,7 @@ $t2 = microtime(true);
 // addslashes to vars if magic_quotes_gpc is off this is a security
 // precaution to prevent someone trying to break out of a SQL statement.
 //
-if( !@get_magic_quotes_gpc() )
+if(function_exists('get_magic_quotes_gpc') && !@get_magic_quotes_gpc() )
 {
   function sanitize_mysql_kv(&$v, $k)
   {