Fix NPE in Windows around "!" check

[rhyolight]

NullPointerException: entry, in windows env, innerPath startsWith "", and jar.getEntry()return null

[cogmission]

@houkx

This has to be tested outside of Windows. I would suggest testing the Stream to see if it is null, and if it is, then in another try/catch, switching to your method?

In other words, create a block that catches the "normal" NPE (on Windows), then try to use your fix to create the URL in the way Windows likes...

[houkx]

not the stream null, is the entry, jar.getEntry("\rec-center-hourly.csv") return null
so trigger the null check code in java.util.zip.ZipFile:
public InputStream getInputStream(ZipEntry entry) throws IOException {
if (entry == null) {
throw new NullPointerException("entry");// jar.getEntry("\rec-center-hourly.csv") ==null
}
// jar.getEntry("rec-center-hourly.csv") is not null, SO remove the preffix: "\"