[gimp] app: force the image flush after a selection fill.

[Jehan <jehanp src gnome org>]

commit 287d90ba9e90573f41e78226ad3a235933348eb5
Author: Jehan <jehan girinstud io>
Date:   Fri Nov 16 13:41:12 2018 +0100

    app: force the image flush after a selection fill.
    
    Other bucket fills are now done as filter until committed, but basic
    selection fill is still done automatically. So let's make sure the
    canvas is updated immediately (as it used to be before my changes).

 app/tools/gimpbucketfilltool.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/app/tools/gimpbucketfilltool.c b/app/tools/gimpbucketfilltool.c
index 1a944590d6..32cfd3071b 100644
--- a/app/tools/gimpbucketfilltool.c
+++ b/app/tools/gimpbucketfilltool.c
@@ -511,6 +511,7 @@ gimp_bucket_fill_tool_button_press (GimpTool            *tool,
           if (options->fill_selection)
             {
               gimp_drawable_edit_fill (drawable, fill_options, NULL);
+              gimp_image_flush (image);
             }
           else
             {