master 1289d0c3dd 1/2: Fix splurious drag-mouse-1 events after NS drag-and-drop

[Po Lu]

branch: master
commit 1289d0c3dd964a501ea0b039c0ce9bc39ec47caa
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Fix splurious drag-mouse-1 events after NS drag-and-drop
    
    * src/nsterm.m ([EmacsWindow beginDrag:...]): Clear
    dpyinfo->grabbed.
---
 src/nsterm.m | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/nsterm.m b/src/nsterm.m
index ecaca5b87f..04475bbba0 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -9662,7 +9662,6 @@ nswindow_orderedIndex_sort (id w1, id w2, void *c)
   NSInteger window_number;
   NSWindow *w;
 #endif
-
   drag_op = op;
   selected_op = NSDragOperationNone;
   image = [[NSImage alloc] initWithSize: NSMakeSize (1.0, 1.0)];
@@ -9716,6 +9715,11 @@ nswindow_orderedIndex_sort (id w1, id w2, void *c)
 #endif
   unblock_input ();
 
+  /* Assume all buttons have been released since the drag-and-drop
+     operation is now over.  */
+  if (!dnd_return_frame)
+    x_display_list->grabbed = 0;
+
   [image release];
 
   *frame_return = dnd_return_frame;