libgnt/libgnt

Simplify some GntBox internals.

2019-04-24, Elliott Sales de Andrade
6acd81c5c10a
Simplify some GntBox internals.

These functions don't need the extra casts or type conversions if we can
pass them the objects we already have.
# vi:et:ts=2 sw=2 sts=2
image: libgnt/builders:debian-buster-amd64
pipelines:
default:
- step:
script:
- set -ex
- meson build-pipelines
- ninja -C build-pipelines
- ninja -C build-pipelines test
- ninja -C build-pipelines libgnt-doc