Fix the ending char checking condition

[poppinlp]

For windows, we will get LFCR when we press ENTER. In your logic, you only check the data[0], so it's LR for windows.
Or maybe you could change the switch condition here not just use data[0].

[pinheadmz]

Thanks for the review and the bump @Ely68 and for the PR, @poppinlp sorry no one has gotten to review this.

I tried running hs-airdrop without any changes (master branch) in Windows Command Prompt, Ubnutu for Windows, WSL and git-bash, and didn't have any issues on those four entering a passphrase for a private key and hitting "enter". This PR looks right and is certainly minimal so it's probably good to merge, but you could help me reproduce the problem on windows? What was the environment?

[poppinlp]

Wow, it's really a long time ago PR. I remember I met some issues at that time. But, actually, I don't have that env right now. T_T