[1.20f] Ice mining facility removed at start of 1st turn

[Elver]

Generated a new planet on regular difficulty, tech 5. The first turn's video messages announced the initial ice mining facility was removed b/c of resource depletion. Checking the hex, it appears it was a snow-based facility. I ran through a complete local year, and the hex only had snow on season 4 of 6. It feels like initial water resources should probably only use snow terrain if it would be available year-round (and thus not suddenly vanish) or if that's too cumbersome to calculate, instead use finite deposits.

[Vic]

agreed! and i think i am going to stop Water Mines from automatically disappearing too