problem if the string is passed as int

[91DarioDev]

captcha/captcha/image.py

Line 196 in fb6238e

for c in chars:

if the string is passed as int, the function goes in error cause it tries to iterate an integer.
an easy fix is to force the cast as string doing for str(c) ..

[lepture]

I've added type hints for the library. It will tell you that you need to pass a string.