Message 74734 - Python tracker

Note that log2(int) -> float wouldn't entirely replace
numbits, due to loss of precision in the result.

e.g.  log2(2**100), log2(2**100+1) and log2(2**100-1) would likely all
return exactly the same result (100.0), where numbits wants results of 
101, 101 and 100 respectively.