req_body_form() sets req to an empty list

[arcresu]

Ensures that when req$body$data is NULL, an empty list is used instead. Note that this is exactly what is done already a few lines above for req_body_json_modify() which is conceptually doing the same thing.

Fixes #835.

[hadley]

Thanks! Can you please add a bullet to the top of NEWS.md? It should briefly describe the change and end with (@yourname, #issuenumber).

[arcresu]

Done!

[hadley]

Thank you!