Doesn't support multiplying by 0 or 1

[adrian-vlad]

I got this error com.adahas.tools.jmxeval.exception.JMXEvalException: Block [0] in expression [0 * 1] invalid where 0 is the value returned by JMX and 1 is a constant in an expressions similar to ${Value} * 1.

Seems strange that such expression is invalid.