[Rd] cat() in long-running functions only shows up on window resize (PR#6634)

[peter_mcmahan at yahoo.com]

Full_Name: Peter McMahan
Version: R 1.8.0 GUI
OS: Windows 2000
Submission from: (NULL) (67.107.205.66)


when running long functions with cat() commands inside, the requested data
doesn't show up until either the function has finished or the window is resized.
 this is very frustrating for development purposes.
thanks,
peter