[gimp] app: accidentially removed a function's return type

[Michael Natterer <mitch src gnome org>]

commit eafcc4801c0d1137a9d099e852c971bca03dfda4
Author: Michael Natterer <mitch gimp org>
Date:   Sat Apr 27 08:23:58 2013 +0200

    app: accidentially removed a function's return type

 app/gegl/gimp-gegl-nodes.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/app/gegl/gimp-gegl-nodes.c b/app/gegl/gimp-gegl-nodes.c
index 5bd1f1b..202def5 100644
--- a/app/gegl/gimp-gegl-nodes.c
+++ b/app/gegl/gimp-gegl-nodes.c
@@ -185,6 +185,7 @@ gimp_gegl_mode_node_set_mode (GeglNode             *node,
                  NULL);
 }
 
+void
 gimp_gegl_mode_node_set_opacity (GeglNode *node,
                                  gdouble   opacity)
 {