Fix several compile warnings added in some of my recent commits#1710

Merged

TheBlueMatt merged 3 commits intolightningdevkit:mainfrom

TheBlueMatt:2022-09-compile-warn

Sep 11, 2022

Commits on Sep 9, 2022

Fix several compile warnings added in some of my recent commits
TheBlueMatt
committed
Fix (really dumb) warning rustc introduced in latest beta
TheBlueMatt
committed

Commits on Sep 10, 2022

Fix several compile warnings when testing in no-std mode
TheBlueMatt
committed