From 06ecbe3cdae4a21964a09f6728bbae77b87d73fb Mon Sep 17 00:00:00 2001
From: Matt Nadareski <mnadareski@outlook.com>
Date: Fri, 15 Dec 2017 13:40:15 -0800
Subject: [PATCH] [SabreTools, CHDFile] Fix sort issues

---
 SabreTools.Library/FileTypes/CHDFile.cs | 7 +++++++
 SabreTools/SabreTools.cs                | 6 ------
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/SabreTools.Library/FileTypes/CHDFile.cs b/SabreTools.Library/FileTypes/CHDFile.cs
index 342d018a..8af08114 100644
--- a/SabreTools.Library/FileTypes/CHDFile.cs
+++ b/SabreTools.Library/FileTypes/CHDFile.cs
@@ -123,6 +123,13 @@ namespace SabreTools.Library.FileTypes
 
 			// Read and verify the CHD signature
 			m_signature = m_br.ReadBytes(8);
+
+			// If no signature could be read, return null
+			if (m_signature == null || m_signature.Length == 0)
+			{
+				return null;
+			}
+
 			for(int i = 0; i < 8; i++)
 			{
 				if (m_signature[i] != Constants.CHDSignatureBytes[i])
diff --git a/SabreTools/SabreTools.cs b/SabreTools/SabreTools.cs
index 0a55ae5d..90dde5bd 100644
--- a/SabreTools/SabreTools.cs
+++ b/SabreTools/SabreTools.cs
@@ -524,12 +524,6 @@ namespace SabreTools
 						datHeader.Date = (string)feat.Value.GetValue();
 						break;
 					case "dat":
-						if (!File.Exists((string)feat.Value.GetValue()) && !Directory.Exists((string)feat.Value.GetValue()))
-						{
-							Globals.Logger.Error("Must be a valid file or folder of DATs: {0}", (string)feat.Value.GetValue());
-							Globals.Logger.Close();
-							return;
-						}
 						datfiles.AddRange((List<string>)feat.Value.GetValue());
 						break;
 					case "desc":