Fix Motif DND return value upon transfer failure

* src/xterm.c (handle_one_xevent): Make XmTRANSFER_FAILURE clear
DND action.

1 files changed, 8 insertions, 1 deletions

diff --git a/src/xterm.c b/src/xterm.c
index 85339619935..484637807aa 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -15502,7 +15502,14 @@ handle_one_xevent (struct x_display_info *dpyinfo,
             && eventp->selection == dpyinfo->Xatom_XdndSelection
             && (eventp->target == dpyinfo->Xatom_XmTRANSFER_SUCCESS
                 || eventp->target == dpyinfo->Xatom_XmTRANSFER_FAILURE))
-          x_dnd_waiting_for_finish = false;
+          {
+            x_dnd_waiting_for_finish = false;
+
+            /* If the transfer failed, then return nil from
+               `x-begin-drag'.  */
+            if (eventp->target == dpyinfo->Xatom_XmTRANSFER_FAILURE)
+              x_dnd_action = None;
+          }
       }
       break;