[gtk+/gtk-3-22] flowbox: don’t select when rubberbanding over nothing

[Ernestas Kulik <ernestask src gnome org>]

commit 69234066a4dff142d50944daa32748234debdebb
Author: Ernestas Kulik <ernestask gnome org>
Date:   Thu Mar 30 22:29:57 2017 +0300

    flowbox: don’t select when rubberbanding over nothing
    
    When rubberbanding over an empty area, everything is selected on gesture
    end, which is a bit counter-intuitive.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=780735

 gtk/gtkflowbox.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkflowbox.c b/gtk/gtkflowbox.c
index a6fcd1d..24af737 100644
--- a/gtk/gtkflowbox.c
+++ b/gtk/gtkflowbox.c
@@ -3139,7 +3139,9 @@ gtk_flow_box_drag_gesture_end (GtkGestureDrag *gesture,
       if (!priv->rubberband_extend && !priv->rubberband_modify)
         gtk_flow_box_unselect_all_internal (box);
 
-      gtk_flow_box_select_all_between (box, priv->rubberband_first, priv->rubberband_last, 
priv->rubberband_modify);
+      if (priv->rubberband_first && priv->rubberband_last)
+        gtk_flow_box_select_all_between (box, priv->rubberband_first, priv->rubberband_last, 
priv->rubberband_modify);
+
       gtk_flow_box_stop_rubberband (box);
 
       g_signal_emit (box, signals[SELECTED_CHILDREN_CHANGED], 0);