[gegl] apply-lens: make bg-color insensitive when keep-surroundings is active

[N/A <ell src gnome org>]

commit 9449e5716521c841463e3bf05d120dd3812a0067
Author: Ell <ell_se yahoo com>
Date:   Sun Oct 1 01:21:02 2017 -0400

    apply-lens: make bg-color insensitive when keep-surroundings is active

 operations/common-gpl3+/apply-lens.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/operations/common-gpl3+/apply-lens.c b/operations/common-gpl3+/apply-lens.c
index 6820a13..74e761b 100644
--- a/operations/common-gpl3+/apply-lens.c
+++ b/operations/common-gpl3+/apply-lens.c
@@ -43,6 +43,7 @@ property_boolean (keep_surroundings, _("Keep original surroundings"), FALSE)
 
 property_color (background_color, _("Background color"), "none")
   ui_meta ("role", "color-secondary")
+  ui_meta ("sensitive", "! keep_surroundings")
 
 #else