[gimp] Remove duplicated word from a command's description.

[Alexandre Prokoudine <aprokoudine src gnome org>]

commit 0756beecc41b0f12213763ac2859b0d2901cf116
Author: Alexandre Prokoudine <alexandre prokoudine gmail com>
Date:   Sat Jun 22 09:17:23 2013 +0400

    Remove duplicated word from a command's description.
    
    It said "specified specified".

 app/pdb/layer-cmds.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/pdb/layer-cmds.c b/app/pdb/layer-cmds.c
index 8031b9e..4720961 100644
--- a/app/pdb/layer-cmds.c
+++ b/app/pdb/layer-cmds.c
@@ -1635,7 +1635,7 @@ register_layer_procs (GimpPDB *pdb)
                                "gimp-layer-create-mask");
   gimp_procedure_set_static_strings (procedure,
                                      "gimp-layer-create-mask",
-                                     "Create a layer mask for the specified specified layer.",
+                                     "Create a layer mask for the specified layer.",
                                      "This procedure creates a layer mask for the specified layer. Layer 
masks serve as an additional alpha channel for a layer. A number of different types of masks are allowed for 
initialisation: completely white masks (which will leave the layer fully visible), completely black masks 
(which will give the layer complete transparency, the layer's already existing alpha channel (which will 
leave the layer fully visible, but which may be more useful than a white mask), the current selection or a 
grayscale copy of the layer. The layer mask still needs to be added to the layer. This can be done with a 
call to 'gimp-layer-add-mask'.",
                                      "Spencer Kimball & Peter Mattis",
                                      "Spencer Kimball & Peter Mattis",