Added key + PW functionality not working on armv7h

[qinohe]

After updating tc-play on my ArchLinux arm machines, armv7h tc-play is not working anymore.
It doesn't matter if use the pre-compiled binary or compile it myself the result is the same.
The package hangs if I use a key and password together (see) #75

The containers are on a NAS, I can open them without problems using Debian(tcplay-1.1-6), ArchLinux x86_64 (tcplay -3.3-1)
and also on a Pi (armv7h) but only when running tcplay 2.0-2 not with tcplay 3.3-1.

If you need more info let me know.
Thanks for looking into it ;)