Add the Java system property "org.objectweb.fractal.bf.proxies.verify-bytecode"

to verify bytecode generated with ASM. By default, no verification is done as 
bytecode is correct. Set this property to 'true' to activate bytecode verification.
By side-effect, asm-util.jar and asm-analysis.jar are not still required
while the Java property is set to 'true'.