[fixed] Problems with multiple worker buildings

[clementvw]

bit of the same bug....

1 Quit my job at oilrig - was still on cooldown so i could not, so far, no bug.
2 bought 10 oil... no cash added to the rig invest. (bug)
3 10 oil were produced, i did not recieve wages from that. (bug)
4 Now (hours later) there are 2 workers, but i am not listed.. so i can't quit. (same bug as before in refinary).

Have a good weekend.

[Mit]

Im not quite sure how this happened yet, but i've changed a few things around so that it shouldnt happen again (or if it does, i should be able to find out a bit more about why)..