From: Tobias Stoeckmann <tobias@stoeckmann.org>
Date: Sat, 25 Mar 2017 20:16:01 +0000 (+0100)
Subject: Properly clear the last entered character
X-Git-Url: https://git.xinqibao.xyz/slock.git/commitdiff_plain/35633d45672d14bd798c478c45d1a17064701aa9?hp=35633d45672d14bd798c478c45d1a17064701aa9

Properly clear the last entered character

When enter is pressed, passwd[len] will be set to '\0'. Pressing
backspace is supposed to remove the last entered character.

But currently, the clearing has an off-by-one, as in setting
passwd[len] to '\0' just like enter would do.

You can also verify it by imagining len=1 and that it's impossible to
clear passwd[0] by pressing backspace with the current code.

Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
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