Silence potential connection failure in SKIPIF section

Otherwise the test will be reported as BORKED.

Author: cmb69

ext/mysqli/tests/mysqli_fork.phpt

@@ -12,7 +12,7 @@ if (!function_exists('posix_getpid'))
     die("skip POSIX functions not available");
 
 require_once 'connect.inc';
-if (!$link = my_mysqli_connect($host, $user, $passwd, $db, $port, $socket))
+if (!$link = @my_mysqli_connect($host, $user, $passwd, $db, $port, $socket))
     die(sprintf("skip Can't connect to MySQL Server - [%d] %s", mysqli_connect_errno(), mysqli_connect_error()));
 
 if (!have_innodb($link))