[gtk+] treeview: restrict the multipress gesture to GDK_BUTTON_PRIMARY

[Carlos Garnacho <carlosg src gnome org>]

commit 541ed65a51ce4b389f19cdd942d117d90fe0a0b2
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Jun 1 20:20:08 2014 +0200

    treeview: restrict the multipress gesture to GDK_BUTTON_PRIMARY
    
    ::row-activated only used to be triggered by GDK_BUTTON_PRIMARY, so make
    the multipress gesture handling this now to be only triggered by that same
    button.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=731020

 gtk/gtktreeview.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index 0001c18..f6b973b 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -1840,6 +1840,8 @@ gtk_tree_view_init (GtkTreeView *tree_view)
 
   tree_view->priv->multipress_gesture = gtk_gesture_multi_press_new (GTK_WIDGET (tree_view));
   gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (tree_view->priv->multipress_gesture), FALSE);
+  gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (tree_view->priv->multipress_gesture),
+                                 GDK_BUTTON_PRIMARY);
   g_signal_connect (tree_view->priv->multipress_gesture, "pressed",
                     G_CALLBACK (_tree_view_multipress_pressed), tree_view);
   gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (tree_view->priv->multipress_gesture),