Merge pull request #10535 from pchote/mix-type-autodetection

Auto-detect mix hash type.

OpenRA.Game/ModData.cs

@@ -176,7 +176,7 @@ namespace OpenRA
 			ModFiles.LoadFromManifest(Manifest);
 
 			// Mount map package so custom assets can be used. TODO: check priority.
-			ModFiles.Mount(ModFiles.OpenPackage(map.Path, null, int.MaxValue));
+			ModFiles.Mount(ModFiles.OpenPackage(map.Path, int.MaxValue));
 
 			using (new Support.PerfTimer("Map.PreloadRules"))
 				map.PreloadRules();