#16 Compatibility issue with standard ZIP in getNextExntry

[Peter van den Berkmortel]

We use JazzLib to read certain files. These files can be either ASCII or Zipfiles. Because the extension is the same, we use ZIP to detect the difference in these files.

In standard Java ZIP when we open an ASCII file, the getNextEntry returns a NULL pointer. In JazzLib an exception is thrown (java.util.zip.ZipException: Wrong Local header signature). Although it is easy to fix this on the one place that we need it, this compatibility issue can come around and bite us in other places as well.

Please fix.