Paginate and Overhand Error Bugs

[yukihirop]

Summary

Fix #16

SS

before(demo)

after(demo)

before(demo/resize)

$ bin/gfzs demo
Error: addwstr() returned ERR

after(demo/resize)

Test

Currently there are no tests.
Instead, the operation is guaranteed by executing the following command and actually checking the operation.

• python3 gfzs/views/not_found.py
• python3 gfzs/views/paging.py
• python3 gfzs/views/footer.py
• python3 gfzs/views/header.py
• python3 gfzs/views/search_result.py
• python3 gfzs/utils/markup.py
• python3 gfzs/utils/color.py
• python3 gfzs/runtime/config.py
• python3 gfzs/cmd/init.py
• python3 gfzs/cmd/edit.py
• python3 gfzs/cmd/demo.py
• python3 gfzs/cmd/valid.py
• python3 gfzs/controller.py
• python3 gfzs/model.py
• cat fixtures/rust.json | bin/gfzs -s 20 -l 0 -p ./tmp/gfzs.log
• cat fixtures/rust.json | python3 -m gfzs -s 40 -l 0 -p ./tmp/gfzs.log
• bin/gfzs -l 0 -p ./tmp/gfzs.log init
• bin/gfzs -l 0 -p ./tmp/gfzs.log edit
• bin/gfzs -l 0 -p ./tmp/gfzs.log demo
• bin/gfzs -l 0 -p ./tmp/gfzs.log valid
• black gfzs/**/*.py

[yukihirop]

LGTM