TC cost increases by 100% per excessive heat unit not 1%

[Former user]

Current: price["val"] *= (1 + (this.game.time.heat - heatMax)); //1% per excessive heat unit

Should be (if comment is correct): price["val"] *= (1 + (this.game.time.heat - heatMax) * 0.01); //1% per excessive heat unit

[freeroot]

fixes #112

→ <<cset ddca98fb62ad>>