Issue11340

Fix https://pharo.fogbugz.com/f/cases/11340/Code-generator-with-Integer-floats-comparison

This substantially fast up (SmallInteger comparison_op Float) which was downgraded in Cog versus classical interpreter VM.

Though I personnally find it's worth integrating, it is not a bugfix but rather an enhancement.
Up to you to integrate in Pharo3.0 or let it wait till next cycle...