Folding Empty Aspects

Folding empty aspects causes an exception and should not be tried.

java.lang.AssertionError: (16341,16341), text: {}, language = Language: JastAddAspect
	at com.intellij.lang.folding.FoldingDescriptor.<init>(FoldingDescriptor.java:178)
	at com.intellij.lang.folding.FoldingDescriptor.<init>(FoldingDescriptor.java:102)
	at com.intellij.lang.folding.FoldingDescriptor.<init>(FoldingDescriptor.java:83)
	at com.intellij.lang.folding.FoldingDescriptor.<init>(FoldingDescriptor.java:68)
	at com.intellij.lang.folding.FoldingDescriptor.<init>(FoldingDescriptor.java:51)
	at org.jastadd.tooling.aspect.AspectFoldingBuilder.buildFoldRegions(AspectFoldingBuilder.java:53)
	at com.intellij.lang.folding.LanguageFolding.buildFoldingDescriptorsNoPlaceholderCaching(LanguageFolding.java:88)