ssl_closed fix

[AlexanderKai]

Here is a few lines of code that can fix up issue #464 in my opinion.

[benoitc]

I willl test it later today but looks good so far. Thanks for the patch!

[stephenmoloney]

I tried to backport these changes to 1.10.1 but I am still running into the same error.
I can't upgrade to 1.11.0 as I keep running into the error on #447. I can reproduce the error in #447 and I'll post that over on that issue once i get the chance.

The local tests don't seem to output the error but building on travis does.

1.10.1 -> https://travis-ci.org/stephenmoloney/fastimage/builds/345600324

1.10.1 with ssl_fix -> https://travis-ci.org/stephenmoloney/fastimage/builds/345602341

p.s. The fastimage codebase is in a state of flux.

[AlexanderKai]

@stephenmoloney
That fix don't solves issue #447.

[critch]

While testing this for #479 I ran into what might be a worse situation. While not crashing out with the unexpected error message, it will not return the done message. So in effect, the download loop will fail to exit do to never receiving the done message.

[AlexanderKai]

@critch
Can you send me a test case to reproduce that?

[benoitc]

have a look in #482 as well, that should probably fix the error but let me know.

[benoitc]

i commited 91aadac which should fix the issue. Thanks for the patch anyway :)