R-alpha: bug in passing of empty (...)

[Martin Maechler]

This is too bad (and an old bug at least since 0.49); 
it also breaks some code I have been using in S-plus:

> tst <- function(...) ls(...)

> tst()#--- should really give the same as ls() !!
character(0)

> ls()
  [1] "%in%"                   "As.integer"             "Dir"                   
  [4] "Dir0"                   "Fn12"                   "Slynx"                 
  ......
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