com.jme3.audio.LowPassFilter lacks the required no-argument constructor for jME deserialization

[capdevon]

com.jme3.audio.LowPassFilter lacks the required no-argument constructor for jME deserialization.

java.lang.InstantiationException: Loading requires a no-arg constructor, but class com.jme3.audio.LowPassFilter lacks one.
	at com.jme3.export.SavableClassUtil.findNoArgConstructor(SavableClassUtil.java:248)
	at com.jme3.export.SavableClassUtil.fromName(SavableClassUtil.java:187)
	at com.jme3.export.binary.BinaryImporter.readObject(BinaryImporter.java:332)
	at com.jme3.export.binary.BinaryImporter.load(BinaryImporter.java:245)
	at com.jme3.export.binary.BinaryImporter.load(BinaryImporter.java:128)
	at com.jme3.export.binary.BinaryImporter.load(BinaryImporter.java:282)
	at com.jme3.export.binary.BinaryExporter.saveAndLoad(BinaryExporter.java:168)

> Task :jme3-core:test FAILED
AudioFilterTest > testSaveAndLoad FAILED
    java.lang.NullPointerException: Cannot invoke "com.jme3.audio.LowPassFilter.getVolume()" because "copy" is null
        at com.jme3.audio.AudioFilterTest.testSaveAndLoad(AudioFilterTest.java:27)
1 test completed, 1 failed