Allow ai city to re-assign specialists.

core/src/com/unciv/logic/automation/NextTurnAutomation.kt

@@ -117,6 +117,7 @@ class NextTurnAutomation{
     private fun reassignWorkedTiles(civInfo: CivilizationInfo) {
         for (city in civInfo.cities) {
             city.workedTiles.clear()
+            city.population.specialists.clear()
             (0..city.population.population).forEach { city.population.autoAssignPopulation() }
             Automation().chooseNextConstruction(city.cityConstructions)
             if (city.health < city.getMaxHealth())

core/src/com/unciv/models/stats/Stats.kt

@@ -15,6 +15,15 @@ open class Stats() {
         setStats(hashMap)
     }
 
+    fun clear() {
+        production = 0f
+        food = 0f
+        gold = 0f
+        science = 0f
+        culture = 0f
+        happiness = 0f
+    }
+
     fun add(other: Stats) {
         // Doing this through the hashmap is nicer code but is SUPER INEFFICIENT!
         production += other.production