Prevents 4 E_NOTICEs when POST fields are not set. (#5458)
Prevents 4 E_NOTICEs when POST fields are not set. (#5458)

* Prevents 4 E_NOTICEs when POST fields are not set.

* Don't use x().

* Replaced usage of x() which is deprecated with !isset().

* Use empty() according to MrPetovan

friendica/friendica,friendica/friendica,fabrixxm/friendica,annando/friendica,annando/friendica,fabrixxm/friendica,fabrixxm/friendica,tobiasd/friendica,annando/friendica,annando/friendica,tobiasd/friendica,friendica/friendica,tobiasd/friendica,tobiasd/friendica,fabrixxm/friendica,friendica/friendica,friendica/friendica,tobiasd/friendica,annando/friendica,fabrixxm/friendica