[PATCH] Make Way to avoid compile failure on undefined env

[Tommy Yu]

Hi,

I've created a patch that extends `allow_empty` to prevent undefined environment variable from causing a compilation error.

Repository: <https://codeberg.org/metatoaster/rust-embed/>

Patch: <https://codeberg.org/metatoaster/rust-embed/commit/d4ed274a9b0dd8ed1e5614f1727d6b838fa44bbb.patch>

The intention of this patch is to allow a library that might offer a hook to optionally embed files to compile successfully even if the environment variable isn't set, which may be the case during `cargo clippy` or other integration tests.

Regards,

Tommy.

[Peter John]

Hi Tommy,

Thanks. I've applied your patch and will release a new version soon with the changes.

Regards,
Peter