[gtk+/gtk-3-16] entry completion: Only grab the device if we have one

[Matthias Clasen <matthiasc src gnome org>]

commit 90a1a3c0f4b99e38e9c50504859de0490eb42df5
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Oct 15 20:16:54 2015 -0400

    entry completion: Only grab the device if we have one
    
    When the entry completion is popped up from a timeout, we may
    not have a device. In that case, don't call gdk_device_grab,
    do avoid criticals.

 gtk/gtkentrycompletion.c |   21 ++++++++++++---------
 1 files changed, 12 insertions(+), 9 deletions(-)
---
diff --git a/gtk/gtkentrycompletion.c b/gtk/gtkentrycompletion.c
index 80a8dff..235a318 100644
--- a/gtk/gtkentrycompletion.c
+++ b/gtk/gtkentrycompletion.c
@@ -1660,15 +1660,18 @@ gtk_entry_completion_popup (GtkEntryCompletion *completion)
 
   gtk_widget_show (completion->priv->popup_window);
 
-  gtk_device_grab_add (completion->priv->popup_window, completion->priv->device, TRUE);
-  gdk_device_grab (completion->priv->device, gtk_widget_get_window (completion->priv->popup_window),
-                   GDK_OWNERSHIP_WINDOW, TRUE,
-                   GDK_BUTTON_PRESS_MASK |
-                   GDK_BUTTON_RELEASE_MASK |
-                   GDK_POINTER_MOTION_MASK,
-                   NULL, GDK_CURRENT_TIME);
-
-  completion->priv->has_grab = TRUE;
+  if (completion->priv->device)
+    {
+      gtk_device_grab_add (completion->priv->popup_window, completion->priv->device, TRUE);
+      gdk_device_grab (completion->priv->device, gtk_widget_get_window (completion->priv->popup_window),
+                       GDK_OWNERSHIP_WINDOW, TRUE,
+                       GDK_BUTTON_PRESS_MASK |
+                       GDK_BUTTON_RELEASE_MASK |
+                       GDK_POINTER_MOTION_MASK,
+                       NULL, GDK_CURRENT_TIME);
+
+      completion->priv->has_grab = TRUE;
+    }
 }
 
 void