`LOG` test is incorrect.

[python-processing-unit]

According to the specification section 9.1.3:

• INT|FLT: LOG(INT|FLT: value) and INT: CLOG(INT: value) = MUST compute, respectively, floor base-2 logarithm and ceiling base-2 logarithm. The argument MUST be strictly positive.

The test passing/log-float, however, requires the INT floor of the logarithm of a FLT value.