[gegl] Escaped percent sign in gettext string.

[Marco Ciampa <marcoc src gnome org>]

commit 7018e97ad1aa1b1c6ae7486d27a2b5d939687a51
Author: Marco Ciampa <ciampix libero it>
Date:   Mon Apr 27 08:30:13 2015 +0200

    Escaped percent sign in gettext string.

 operations/common/brightness-contrast.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/operations/common/brightness-contrast.c b/operations/common/brightness-contrast.c
index 731ce38..5ab418c 100644
--- a/operations/common/brightness-contrast.c
+++ b/operations/common/brightness-contrast.c
@@ -149,7 +149,7 @@ gegl_op_class_init (GeglOpClass *klass)
       "name",       "gegl:brightness-contrast",
       "title",      "Brightness Contrast",
       "categories", "color",
-      "description", _("Changes the light level and contrast. This operation operates in linear light, 
'contrast' is a scale factor around 50% gray, and 'brightness' a constant offset to apply after contrast 
scaling."),
+      "description", _("Changes the light level and contrast. This operation operates in linear light, 
'contrast' is a scale factor around 50%% gray, and 'brightness' a constant offset to apply after contrast 
scaling."),
       "cl-source"  , brightness_contrast_cl_source,
       "reference-composition", composition,
       NULL);