* Introduce CheckNonZeroSender

* Missing file

* Formatting

* Fixes

* Formatting

* some fixes to compile

* Update frame/system/src/extensions/check_non_zero_sender.rs

Co-authored-by: Bastian Köcher <[email protected]>

* Fixes

* Fixes

* another fix

* Formatting

Co-authored-by: Shawn Tabrizi <[email protected]>
Co-authored-by: Bastian Köcher <[email protected]>