Could not create destination file error

Ran into this issue on a shared hosting provider where the system wide temporary directory is not writeable. I didn't look into the dev version, maybe this is already fixed.

For a reason that is unclear to me on line 238 within wordpress_migrate.migrate.inc the code attempts to create a temporary file with usage of sys_get_temp_dir() but in my case on a shared hosting environment this returns a directory that is not writeable:

$tmpfile = tempnam(sys_get_temp_dir(), 'wp_');

Replaced it to work with the temporary directory according to drupal settings:

$tmpfile = tempnam(file_directory_temp(), 'wp_');

Steps to reproduce:
Content --> Migrate --> Migrate from Wordpress --> Enter URL / Login credentials --> Import --> Error Message "Could not create destination file".