Fix drag and drop from some Qt versions

* lisp/x-dnd.el (x-dnd-handle-xdnd): Fix XdndDrop time stamp bug.
Problem and tiny change reported by Urs Fleisch (Bug#20804).
Copyright-paperwork-exempt: yes

1 files changed, 3 insertions, 1 deletions

diff --git a/lisp/x-dnd.el b/lisp/x-dnd.el
index 4297ef4ed4a..b22af5cc770 100644
--- a/lisp/x-dnd.el
+++ b/lisp/x-dnd.el
@@ -485,10 +485,12 @@ FORMAT is 32 (not used).  MESSAGE is the data part of an XClientMessageEvent."
         ((equal "XdndDrop" message)
          (if (windowp window) (select-window window))
          (let* ((dnd-source (aref data 0))
+                (timestamp (aref data 2))
                 (value (and (x-dnd-current-type window)
                             (x-get-selection-internal
                              'XdndSelection
-                             (intern (x-dnd-current-type window)))))
+                             (intern (x-dnd-current-type window))
+                             timestamp)))
                 success action)
 
            (setq action (if value