Some Panics cause segfaults in jemalloc when called from flate2

[oyvindln]

Ideally we should never panic of course, but there could still be bugs, and if there are, it shouldn't end up in a segfault.
See this
I've tried with removing no_mangle and extern_c from mz_inflate, so that doesn't seem to be the issue.

[Shnatsel]

Is this what #36 is supposed to fix?

[oyvindln]

I don't know if that was background for it, but it may be related yea. It's something that needs to be sorted in either case. Ideally we woulldn't go through the C Api for flate2 (#16). Going through a C API will always require unsafe.

The project got a bit stalled, but I at least want to look into this again. Would be nice to have some more eyes and help on this though :)

[oyvindln]

I couldn't reproduce this with the current code, so this may have been fixed as of now, but I'll do some more testing before closing.

[oyvindln]

Closing this for now since the C api is no longer used and I haven't been able to reproduce this.

[oyvindln]

Forgot to actually click close..