Fix for PHP 5.6

[white-gecko]

There is a bug in PHP 5.6 regarding arrays in classes with more then 65538 elements and thus the since the key is limited to 64bit. This PHP bug is discussed in https://bugs.php.net/bug.php?id=68057. and marked as wont-fix. This bug effects JLexPHP with the array for $yy_cmap. With these commits, there is a workaround for this bug in PHP 5.6.