[gthumb] fixed crash when dragging files using the middle button

[Paolo Bacchilega <paobac src gnome org>]

commit 9bf0ae1da01cc12639a51bc55bd23c7d2867773e
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sat Jan 5 16:48:36 2019 +0100

    fixed crash when dragging files using the middle button

 gthumb/gth-grid-view.c | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/gthumb/gth-grid-view.c b/gthumb/gth-grid-view.c
index 78165dba..c5414f38 100644
--- a/gthumb/gth-grid-view.c
+++ b/gthumb/gth-grid-view.c
@@ -3164,8 +3164,6 @@ gth_grid_view_motion_notify (GtkWidget      *widget,
                                                                   (GdkEvent *) event,
                                                                   -1,
                                                                   -1);
-                       if (self->priv->drag_button == 2)
-                               gdk_drag_status (context, GDK_ACTION_ASK, event->time);
 
                        /* FIXME: create a cool drag icon here */
                        multi_dnd = self->priv->selection->next != NULL;