[gimp] app: credit the color-rotate authors in the GimpDial copyrights

[Michael Natterer <mitch src gnome org>]

commit db7b87e8cffd9c43d2417352ed4d4f169eadb498
Author: Michael Natterer <mitch gimp org>
Date:   Sun May 25 17:25:39 2014 +0200

    app: credit the color-rotate authors in the GimpDial copyrights

 app/widgets/gimpdial.c |    4 ++++
 app/widgets/gimpdial.h |    4 ++++
 2 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/app/widgets/gimpdial.c b/app/widgets/gimpdial.c
index 72f3876..22ae7c6 100644
--- a/app/widgets/gimpdial.c
+++ b/app/widgets/gimpdial.c
@@ -4,6 +4,10 @@
  * gimpdial.c
  * Copyright (C) 2014 Michael Natterer <mitch gimp org>
  *
+ * Based on code from the color-rotate plug-in
+ * Copyright (C) 1997-1999 Sven Anders (anderss fmi uni-passau de)
+ *                         Based on code from Pavel Grinfeld (pavel ml com)
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 3 of the License, or
diff --git a/app/widgets/gimpdial.h b/app/widgets/gimpdial.h
index 4390f5e..c32066a 100644
--- a/app/widgets/gimpdial.h
+++ b/app/widgets/gimpdial.h
@@ -4,6 +4,10 @@
  * gimpdial.h
  * Copyright (C) 2014 Michael Natterer <mitch gimp org>
  *
+ * Based on code from the color-rotate plug-in
+ * Copyright (C) 1997-1999 Sven Anders (anderss fmi uni-passau de)
+ *                         Based on code from Pavel Grinfeld (pavel ml com)
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 3 of the License, or