Fixed bug that prevented the "next turn" button from being pressed when the game didn't autosave,

meaning players who picked turns between autosaves manually were screwed

core/src/com/unciv/logic/civilization/CivilizationInfo.kt

@@ -144,7 +144,6 @@ class CivilizationInfo {
     fun getStatMapForNextTurn(): HashMap<String, Stats> {
         val statMap = HashMap<String,Stats>()
         for (city in cities){
-            val statBonuses = Stats()
             if(!statMap.containsKey("Cities")) statMap["Cities"]=Stats()
             statMap["Cities"] = statMap["Cities"]!! + city.cityStats.currentCityStats
         }

core/src/com/unciv/ui/worldscreen/WorldScreen.kt

@@ -269,6 +269,7 @@ class WorldScreen : CameraStageBaseScreen() {
                         updateNextTurnButton()
                     }
                 }
+                else nextTurnButton.enable() // Enable immediately
 
                 // If we put this BEFORE the save game, then we try to save the game...
                 // but the main thread does other stuff, including showing tutorials which guess what? Changes the game data