No negative crop field broken

[006fix]

in possible buildings function in village, a crop per hour value is generated, with the goal that if pop increase > crop per hour, a building cannot be built.

This does not work.

If a "crop per hour minus one" is used, players can STILL reach negative values

If a "crop per hour minus two" is used, players can STILL reach zero

Left as "crop per hour minus three", since this stops any player reaching zero, but why is this true???

[006fix]

I think it's possible this may relate to the population usage of new buildings. It accounts for all population EXCEPT for the population gained by the new building, which will lead to the values decreasing below zero