Don't throw on getting invalid datetime

SabreTools.Library/External/Compress/ZipFile/zipFile.cs

@@ -1128,6 +1128,8 @@ namespace Compress.ZipFile
             public DateTime DateTime
             {
                 get
+                {
+                    try
                     {
                         if (_lastModFileDateTime == null)
                         {
@@ -1146,6 +1148,11 @@ namespace Compress.ZipFile
                             return SabreTools.Library.Tools.Utilities.ConvertMsDosTimeFormatToDateTime(_lastModFileDateTime.Value);
                         }
                     }
+                    catch
+                    {
+                        return DateTime.MinValue;
+                    }
+                }
             }
 
             public ulong LocalFilePos