math.parser: fix tests for 0.0 0.0 / platform dependent result.
math.parser: fix tests for 0.0 0.0 / platform dependent result.

factor/factor,mrjbq7/factor,tgunr/factor,factor/factor,tgunr/factor,mrjbq7/factor,factor/factor,mrjbq7/factor,mrjbq7/factor,tgunr/factor,mrjbq7/factor,factor/factor,tgunr/factor,factor/factor,tgunr/factor,tgunr/factor,mrjbq7/factor,factor/factor