feature/noverlay updated (1f31534f51 -> 8bd114b98a)

[Stefan Monnier]

monnier pushed a change to branch feature/noverlay.

      from  1f31534f51 itree.c: Fix corner case errors in offsets
       new  a1f1fdd291 * src/itree.c (interval_tree_remove_fix): Move before 
first use
       new  8bd114b98a itree.c: Get rid of the trick using null->parent


Summary of changes:
 src/itree.c | 226 ++++++++++++++++++++++++++++++++----------------------------
 1 file changed, 120 insertions(+), 106 deletions(-)