I noticed a small building bug

[Optimus Prime]

I had a commander who was producing 4.0 metal and i had 2 units which had an metaloutput of 2.0 each - so -4.0. But my commander was still able to build buildings - slow, but it was possible and i think this shouldnt be.
Someone should fix this for the next release.

I think its because every tick you get 4 metal and before the -4 metal is substracted, the unit builds for one tick with 4 metal. Make it so that the total income is calculated as one value so the metal income would be 0 and not 4 and -4.