ASM 5.0 makes it illegal for subclasses to call ClassNode's default
constructor.

http://asm.ow2.org/asm50/javadoc/user/org/objectweb/asm/tree/ClassNode.html#ClassNode()
Merge pull request #1011 from cushon/asmfix

ASM 5.0 makes it illegal for subclasses to call ClassNode's default constructor.