[gimp] libgimpwidgets: fix the def file.

[Jehan <jehanp src gnome org>]

commit 9f03bdce30aac09c3d9cfd05f574bef2fa896786
Author: Jehan <jehan girinstud io>
Date:   Fri Nov 20 10:10:47 2020 +0100

    libgimpwidgets: fix the def file.

 libgimpwidgets/gimpwidgets.def | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/libgimpwidgets/gimpwidgets.def b/libgimpwidgets/gimpwidgets.def
index 80c5821251..e269a3cd17 100644
--- a/libgimpwidgets/gimpwidgets.def
+++ b/libgimpwidgets/gimpwidgets.def
@@ -227,6 +227,7 @@ EXPORTS
        gimp_int_store_new
        gimp_int_store_new_valist
        gimp_label_int_widget_get_type
+       gimp_label_int_widget_get_widget
        gimp_label_int_widget_new
        gimp_label_set_attributes
        gimp_label_spin_get_spin_button