[Libguestfs] [PATCH 0/1] dib: handle unsetting functions in environment

This fixes this error I'm hitting when trying to run virt-dib: $ ./run virt-dib -v -x -B ~/git/diskimage-builder/lib/ --element-path ~/git/diskimage-builder/elements/ fedora-minimal [ 0.0] Elements: base fedora-minimal [ 0.0] Expanded elements: base dib-init-system dib-run-parts fedora-minimal install-types package-installs pkg-map redhat-common rpm-distro yum yum-minimal [ 0.0] Carried environment variables: [ 0.0] Preparing auxiliary data [ 0.2] Running: extra-data.d/10-create-pkg-map-dir /tmp/dib.hfC3qu/aux/fake-bin/sudo: line 39: unset: `BASH_FUNC_module()': not a valid identifier virt-dib: error: external command ''/tmp/dib.hfC3qu/run-part-extra.sh' '/tmp/dib.hfC3qu/aux/hooks/extra-data.d' '10-create-pkg-map-dir'' exited with error 1