[Rd] logical operator and addition (PR#10665)

[nicolas_simonis at dfci.harvard.edu]

Full_Name: Nicolas Simonis
Version: 2.6.1
OS: windows
Submission from: (NULL) (155.52.10.223)


Very funny bug :

> 0.6<0.6
[1] FALSE
> 0.6<0.4+0.2
[1] TRUE

control :

> 0.7<0.7
[1] FALSE
> 0.7<0.4+0.3
[1] FALSE

With R 2.6.1 windows. it's not doing it with R 2.3.1 linux...