[mutter] (14 commits) ...core: Cater for reading selection in chunks

[Robert Mader <rmader src gnome org>]

Summary of changes:

  06d67b6... x11: XMaxRequestSize returns 4-byte units (*)
  967966c... x11: Flag flushes despite having less than the element size (*)
  a32cb71... x11: Intern INCR atom (*)
  e95c365... x11: Unset pending flush flag right before notifying on tas (*)
  8a2b828... x11: Ensure flush() Flushes all output stream data (*)
  7c939d7... x11: Only send SelectionNotify on first INCR chunk (*)
  0b21dcf... x11: Wait till data is flushed before notifying on the pend (*)
  04d429b... x11: Finish INCR transfers properly (*)
  d2c762c... x11: Don't invariably queue a pending delete request (*)
  7015bb3... x11: Don't exceed transfer size in INCR chunks (*)
  a4596be... x11: Fix iterative INCR property checks (*)
  655a783... x11: Don't stall on write_async() (*)
  1909977... x11: Do not trust there is task in error paths (*)
  4bdf9a1... core: Cater for reading selection in chunks (*)

(*) This commit already existed in another branch; no separate mail sent