master updated (e21c761d13 -> c60cb3baa7)

[Po Lu]

oldosfan pushed a change to branch master.

      from  e21c761d13 Prevent crashes with very large Motif targets tables
       new  cbc0d8f7c7 Don't display mouse face during mouse drag-and-drop
       new  c60cb3baa7 Don't allow dropping on invalid drop sites


Summary of changes:
 lisp/mouse.el |  1 +
 lisp/x-dnd.el | 76 ++++++++++++++++++++++++++++++++++++-----------------------
 2 files changed, 47 insertions(+), 30 deletions(-)