[gforth] A little do-nothing in recognizer.fs: get-stack

[James Gere]

     In line 79 of recognizer.fs , at the start of "get-stack",  the
sequence:
        dup swap
  -- seems unintentional unless it's a place- or time- holder.
    Since the code works, "2dup swap" makes no sense.
    This is the only example in all of Gforth presently.