[gimp] Issue 7128: Mouse wheel zoom when cursor is over the zoom scrolldown.

[Jehan <jehanp src gnome org>]

commit dd03716fae198cfae1bb17dd28ddb5da8c86b198
Author: Massimo Valentini <mvalentini335 gmail com>
Date:   Tue Aug 10 15:01:14 2021 +0200

    Issue 7128: Mouse wheel zoom when cursor is over the zoom scrolldown.

 app/display/gimpscalecombobox.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/app/display/gimpscalecombobox.c b/app/display/gimpscalecombobox.c
index c9525267b3..efb28a478c 100644
--- a/app/display/gimpscalecombobox.c
+++ b/app/display/gimpscalecombobox.c
@@ -126,6 +126,8 @@ gimp_scale_combo_box_constructed (GObject *object)
 
   entry = gtk_bin_get_child (GTK_BIN (combo_box));
 
+  gtk_widget_add_events (GTK_WIDGET (entry), GDK_SCROLL_MASK);
+
   g_object_set (entry,
                 "xalign",             1.0,
                 "width-chars",        5,