[gimp] docs: libgimp3: Add missing GimpProgressVtable*Func

[Niels De Graef <nielsdg src gnome org>]

commit ec7db847d01d4351b0600eb4eb678960ffb71cd5
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Tue May 12 22:54:11 2020 +0200

    docs: libgimp3: Add missing GimpProgressVtable*Func
    
    We added these entries for the GObject introspection annotations, but
    forgot to add them to the gtk-doc sections.

 devel-docs/libgimp/libgimp3-sections.txt | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/devel-docs/libgimp/libgimp3-sections.txt b/devel-docs/libgimp/libgimp3-sections.txt
index 01859b036f..8a11ea45df 100644
--- a/devel-docs/libgimp/libgimp3-sections.txt
+++ b/devel-docs/libgimp/libgimp3-sections.txt
@@ -1391,6 +1391,12 @@ gimp_param_vectors_get_type
 <SECTION>
 <FILE>gimpprogress</FILE>
 GimpProgressVtable
+GimpProgressVtableEndFunc
+GimpProgressVtableGetWindowFunc
+GimpProgressVtablePulseFunc
+GimpProgressVtableSetTextFunc
+GimpProgressVtableSetValueFunc
+GimpProgressVtableStartFunc
 gimp_progress_init
 gimp_progress_init_printf
 gimp_progress_update