RScript:Assignment of output of function with multiple parameters is parsed wrong

Failing example: a <- c(1,1)
The generated node looks like this:

function call expr{   
id: 
  a<-c 
parameters: 
  1,1}

This should be an assignment operator expr. Other function calls with at most one parameter seem to work fine.

Fixed in master. Still doesn't work for code like this: a <- c() +c()

[fac2003]

This is fixed in master. Please check.