[gegl] operations: Fix typo in gegl:vignette (photograpy) (bug #748777)

[Michael Natterer <mitch src gnome org>]

commit e74796388cb944121bb3eeb1d135223bcc2ac3ae
Author: Anders Jonsson <anders jonsson norsjovallen se>
Date:   Sat May 2 00:01:54 2015 +0200

    operations: Fix typo in gegl:vignette (photograpy) (bug #748777)

 operations/common/vignette.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/operations/common/vignette.c b/operations/common/vignette.c
index 671b6c5..0a2ca9c 100644
--- a/operations/common/vignette.c
+++ b/operations/common/vignette.c
@@ -383,7 +383,7 @@ gegl_op_class_init (GeglOpClass *klass)
     "description", _("Applies a vignette to an image. Simulates the luminance "
                      "fall off at the edge of exposed film, and some other "
                      "fuzzier border effects that can naturally occur with "
-                     "analog photograpy"),
+                     "analog photography"),
   NULL);
 }