Freeciv

dai_manage_cities() resets every city's choice.want to -1, then calls dai_spend_gold(), which looks for the city with the highest want. Nothing beats zero, so the loop exits doing nothing. The reset moved ahead of the spend in c84ce356f5 (2017); the buy code has been maintained ever since, so this can't be intended.

Patch spends first, then resets; dai_spend_gold() already marks what it handled.

Same seed, 8 hard AIs, 120 turns: mean treasury 260 -> 66, units built 56 -> 66, mean score 81 -> 104.