ERROR adding dummy classes in jasperreports-fonts-4.5.0.jar duplicate entry: net/
java.util.zip.ZipException: duplicate entry: net/
	at java.util.zip.ZipOutputStream.putNextEntry(Unknown Source)
	at java.util.jar.JarOutputStream.putNextEntry(Unknown Source)
	at net.stuff.servoy.signing.utils.Repacker.addDummyClass(Repacker.java:161)
	at net.stuff.servoy.signing.utils.Repacker.repack(Repacker.java:36)
	at net.stuff.servoy.CodeSignerFrame.signFile(CodeSignerFrame.java:1384)
	at net.stuff.servoy.CodeSignerFrame.signFile(CodeSignerFrame.java:1359)
	at net.stuff.servoy.CodeSignerFrame.access$25(CodeSignerFrame.java:1351)
	at net.stuff.servoy.CodeSignerFrame$3$1.run(CodeSignerFrame.java:258)
java.lang.NullPointerException
	at net.stuff.servoy.CodeSignerFrame.signFile(CodeSignerFrame.java:1390)
	at net.stuff.servoy.CodeSignerFrame.signFile(CodeSignerFrame.java:1359)
	at net.stuff.servoy.CodeSignerFrame.access$25(CodeSignerFrame.java:1351)
	at net.stuff.servoy.CodeSignerFrame$3$1.run(CodeSignerFrame.java:258)