Fix missing parameter

[Elbandi]

There is a missing parameter from a macro.
Here is the gcc error line:

error: too few arguments to function ‘_php_stream_fopen_with_path’

The source code is:

stream = php_stream_fopen_with_path(file_name, "rb", ".", NULL);

[php-pulls]

Comment on behalf of stas at php.net:

merged