Final ISO9660 fix (#41)

* debug

* using

* Test fix

* Final fix

Author: Deterous

SabreTools.Serialization/Readers/ISO9660.cs

@@ -687,7 +687,7 @@ public static List<PathTableGroup> ParsePathTableGroup(Stream data, short sector
 
                         // Start of sector should not be 0, ignore entire directory
                         int nextRecordLength = data.PeekByteValue();
-                        if (nextRecordLength <= paddingLength)
+                        if (nextRecordLength <= 0)
                             return null;
 
                         continue;