[gimp] app: use gtk_widget_get_preferred_size() not get_requisition() in GimpView

[Michael Natterer <mitch src gnome org>]

commit db1cc4afc30e9dae0dde260c6c362a6b1fc9b45a
Author: Michael Natterer <mitch gimp org>
Date:   Tue May 22 16:46:55 2018 +0200

    app: use gtk_widget_get_preferred_size() not get_requisition() in GimpView

 app/widgets/gimpview.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/widgets/gimpview.c b/app/widgets/gimpview.c
index 19be68e..acf70e7 100644
--- a/app/widgets/gimpview.c
+++ b/app/widgets/gimpview.c
@@ -812,7 +812,7 @@ gimp_view_update_callback (GimpViewRenderer *renderer,
   gint            width;
   gint            height;
 
-  gtk_widget_get_requisition (widget, &requisition);
+  gtk_widget_get_preferred_size (widget, &requisition, NULL);
 
   width  = renderer->width  + 2 * renderer->border_width;
   height = renderer->height + 2 * renderer->border_width;