feat: allow zero slice using func

[fatelei]

fix #268

[CLAassistant]

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[ccoVeille]

No unit test? 😱🤔

[fatelei]

No unit test? 😱🤔

i haven't find where to add ut

[ccoVeille]

Let's wait for a maintainer.

But good thing you took this issue

[ccoVeille]

As it's about slice, I would say here maybe

https://github.com/uber-go/nilaway/blob/main/testdata%2Fsrc%2Fgo.uber.org%2Fslices%2Fslices.go

[fatelei]

As it's about slice, I would say here maybe

https://github.com/uber-go/nilaway/blob/main/testdata%2Fsrc%2Fgo.uber.org%2Fslices%2Fslices.go

ok, i will check it