Another minor bugfix

android/build.gradle

@@ -21,8 +21,8 @@ android {
         applicationId "com.unciv.game"
         minSdkVersion 14
         targetSdkVersion 26
-        versionCode 141
-        versionName "2.8.9"
+        versionCode 142
+        versionName "2.8.10"
     }
     buildTypes {
         release {

core/src/com/unciv/logic/city/CityConstructions.kt

@@ -80,6 +80,7 @@ class CityConstructions {
         else if (GameBasics.Units.containsKey(constructionName))
             return GameBasics.Units[constructionName]!!
         else{
+            if(constructionName=="") return getConstruction("Nothing")
             val special = SpecialConstruction.getSpecialConstructions().firstOrNull{it.name==constructionName}
             if(special!=null) return special
         }
@@ -120,10 +121,9 @@ class CityConstructions {
 
         // Let's try to remove the building from the city, and see if we can still build it (we need to remove because of wonders etc.)
         val saveCurrentConstruction = currentConstruction
-        currentConstruction = "lie"
+        currentConstruction = ""
         if (!construction.isBuildable(this)) {
             // We can't build this building anymore! (Wonder has been built / resource is gone / etc.)
-            currentConstruction=""
             cityInfo.civInfo.addNotification("Cannot continue work on [$saveCurrentConstruction]", cityInfo.location, Color.BROWN)
             Automation().chooseNextConstruction(this)
             construction = getConstruction(currentConstruction)

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

@@ -174,8 +174,9 @@ class WorldScreen : CameraStageBaseScreen() {
             val percentageComplete = civInfo.tech.costOfTech(tech) / civInfo.tech.costOfTech(tech).toFloat()
             // todo
             techButton.add()
+            val turnsToTech = civInfo.tech.turnsToTech(tech)
             techButton.add(Label(tech.tr() + "\r\n"
-                    + civInfo.tech.turnsToTech(tech) + " {turns}".tr(),skin)
+                    + turnsToTech + (if(turnsToTech>1) " {turns}".tr() else " {turn}".tr()),skin)
                     .setFontColor(Color.WHITE).setFont(22))
         }