Check again if the tty is open inside the IO lock (#51222)

This can cause segfaults when exiting julia.

Co-authored-by: Valentin Churavy <vchuravy@users.noreply.github.com>
(cherry picked from commit b3741c0)

base/stream.jl

@@ -565,7 +565,6 @@ displaysize() = (parse(Int, get(ENV, "LINES", "24")),
  parse(Int, get(ENV, "COLUMNS", "80")))::Tuple{Int, Int}
 
 function displaysize(io::TTY)
- # A workaround for #34620 and #26687 (this still has the TOCTOU problem).
  check_open(io)
 
  local h::Int, w::Int
@@ -588,6 +587,7 @@ function displaysize(io::TTY)
  s1 = Ref{Int32}(0)
  s2 = Ref{Int32}(0)
  iolock_begin()
+ check_open(io)
  Base.uv_error("size (TTY)", ccall(:uv_tty_get_winsize,
  Int32, (Ptr{Cvoid}, Ptr{Int32}, Ptr{Int32}),
  io, s1, s2) != 0)