Inconsistent behavior of choose --height 0 when using an empty --header

[yolocat-dev]

Describe the bug
When running gum choose --header "" "a" "b" "c" the --count 0 (default) flag draws one option too little.

To Reproduce
Steps to reproduce the behavior:

1. Execute gum choose "a" "b" "c" and you'll see the three options displayed correctly.
2. Execute gum choose --header "" "a" "b" "c" and you'll see that you have to navigate down to see option "c".

Expected behavior
Setting the --header flag to an empty string should still display all options when --height is set to 0 (default).

Screenshots

Desktop (please complete the following information):

• OS: macOS 14.7.1 23H222 arm64
• Version: gum version 0.14.5