Allow calling `interrupt::free` with zero-arity closures. (0.7.x)#436

reitermarkus wants to merge 2 commits intorust-embedded:v0.7.xrust-embedded/cortex-m:v0.7.xfrom

reitermarkus:interrupt-free-arity-0reitermarkus/cortex-m:interrupt-free-arity-0Copy head branch name to clipboard