Fixed several bugs

[lquenti]

Hi,

maybe this is weird, and sorry if so, but for a uni course I had to statically analyze some java library. Since I used labkit for some batch jython cell counting pipeline I wrote (thanks!), I wanted to give back by using it here.

What I found:

• twice a bit operation instead of a boolean one. Shouldnt break the code, but not correct either
• Once you used != for string comparison, which is a memory comparison.

[maarzt]

@lquenti Thank you for reporting this bugs, and setting up the PR!
Sorry for the late response.