From 249241247b1f013ea9ace31e28d4dfb085ef759d Mon Sep 17 00:00:00 2001
From: SomeTroglodyte <63000004+SomeTroglodyte@users.noreply.github.com>
Date: Thu, 12 Oct 2023 19:38:36 +0200
Subject: [PATCH] Allow games with zero researched techs to be 'before' the
 Ancient Era (#10309)

---
 core/src/com/unciv/ui/screens/pickerscreens/TechPickerScreen.kt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/com/unciv/ui/screens/pickerscreens/TechPickerScreen.kt b/core/src/com/unciv/ui/screens/pickerscreens/TechPickerScreen.kt
index d69b9ff489..d0077d26b7 100644
--- a/core/src/com/unciv/ui/screens/pickerscreens/TechPickerScreen.kt
+++ b/core/src/com/unciv/ui/screens/pickerscreens/TechPickerScreen.kt
@@ -182,7 +182,7 @@ class TechPickerScreen(
                 if (rowIndex == 0)
                     table.padTop(7f)
 
-                if (erasNamesToColumns[civTech.era.name]!!.contains(columnIndex))
+                if (erasNamesToColumns[civTech.era.name]?.contains(columnIndex) == true)
                     table.background = skinStrings.getUiBackground("TechPickerScreen/Background", tintColor = queuedTechColor.darken(0.5f))
 
                 if (tech == null) {