Clean up hack in `MemoryLuaLibrary.GetMemoryDomainList`

src/BizHawk.Client.Common/lua/CommonLibs/MemoryLuaLibrary.cs

@@ -1,4 +1,3 @@
-using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
 
@@ -18,7 +17,7 @@ namespace BizHawk.Client.Common
 		[LuaMethodExample("local nlmemget = memory.getmemorydomainlist();")]
 		[LuaMethod("getmemorydomainlist", "Returns a string of the memory domains for the loaded platform core. List will be a single string delimited by line feeds")]
 		public LuaTable GetMemoryDomainList()
-			=> _th.ListToTable((List<string>) APIs.Memory.GetMemoryDomainList(), indexFrom: 0); //HACK cast will succeed as long as impl. returns .Select<T, string>().ToList() as IROC<string>
+			=> _th.EnumerateToLuaTable(APIs.Memory.GetMemoryDomainList(), indexFrom: 0);
 
 		[LuaMethodExample("local uimemget = memory.getmemorydomainsize( mainmemory.getname( ) );")]
 		[LuaMethod("getmemorydomainsize", "Returns the number of bytes of the specified memory domain. If no domain is specified, or the specified domain doesn't exist, returns the current domain size")]

src/BizHawk.Client.Common/lua/LuaHelper.cs

@@ -8,6 +8,6 @@ namespace BizHawk.Client.Common
 	public static class LuaExtensions
 	{
 		public static LuaTable EnumerateToLuaTable<T>(this NLuaTableHelper tableHelper, IEnumerable<T> list, int indexFrom = 1)
-			=> tableHelper.ListToTable(list.ToList(), indexFrom);
+			=> tableHelper.ListToTable(list as IReadOnlyList<T> ?? list.ToList(), indexFrom);
 	}
 }