From 147fb64185255016c191766cde5bc93a4be1382b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20Mail=C3=A4nder?= <matthias@mailaender.name>
Date: Thu, 5 Dec 2013 19:14:00 +0100
Subject: [PATCH] don't crash map preview when the tileset can not be found

fixes #3033
---
 OpenRA.Game/Widgets/MapPreviewWidget.cs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/OpenRA.Game/Widgets/MapPreviewWidget.cs b/OpenRA.Game/Widgets/MapPreviewWidget.cs
index 5ef3181b6a..538ac9453a 100644
--- a/OpenRA.Game/Widgets/MapPreviewWidget.cs
+++ b/OpenRA.Game/Widgets/MapPreviewWidget.cs
@@ -183,12 +183,16 @@ namespace OpenRA.Widgets
 			}
 		}
 
+		bool compatibleTileset;
+
 		void GeneratePreview()
 		{
 			var m = Map();
 			if (m == null)
 				return;
 
+			compatibleTileset = Rules.TileSets.Values.Any(t => t.Id == m.Tileset);
+
 			var status = Status(m);
 			if (status == PreviewStatus.Uncached)
 				lock (syncRoot)
@@ -201,7 +205,7 @@ namespace OpenRA.Widgets
 			}
 		}
 
-		static PreviewStatus Status(Map m)
+		PreviewStatus Status(Map m)
 		{
 			if (m == null)
 				return PreviewStatus.Invalid;
@@ -213,6 +217,9 @@ namespace OpenRA.Widgets
 
 				if (cacheUids.Contains(m.Uid))
 					return PreviewStatus.Generating;
+
+				if (!compatibleTileset)
+					return PreviewStatus.Invalid;
 			}
 			return PreviewStatus.Uncached;
 		}