Fixed dialyzer errors

```
  make dialyzer
    Checking whether the PLT is up-to-date... yes
    Proceeding with analysis... done in 0m1.27s
  done (passed successfully)
```

And also fixed some styling issues
Line 92 is too long: "            NewAgents = mas_misc_util:meeting_proxy({St#state.interaction, Waitlist}, mas_concurrent, SP, Cf),".