[glom] libgimpbase: Avoid an assignment to self.

[Murray Cumming <murrayc src gnome org>]

commit c5b636e083e803f563c4e187a76cd186bc7c1a44
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Dec 3 09:29:28 2014 +0100

    libgimpbase: Avoid an assignment to self.
    
    gimp_param_unit_value_validate() set a value to itself to not
    change the value, which was strange though not particularly wrong.
    Found by Coverity Scan.
    
    This was also submitted to gimp here:
    https://bugzilla.gnome.org/show_bug.cgi?id=741058

 .../gimpruler/libgimpbase/gimpunit.c               |    6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)
---
diff --git a/glom/utility_widgets/gimpruler/libgimpbase/gimpunit.c 
b/glom/utility_widgets/gimpruler/libgimpbase/gimpunit.c
index bc5e103..46aceb5 100644
--- a/glom/utility_widgets/gimpruler/libgimpbase/gimpunit.c
+++ b/glom/utility_widgets/gimpruler/libgimpbase/gimpunit.c
@@ -558,11 +558,7 @@ gimp_param_unit_value_validate (GParamSpec *pspec,
   GimpParamSpecUnit *uspec = GIMP_PARAM_SPEC_UNIT (pspec);
   gint               oval  = value->data[0].v_int;
 
-  if (uspec->allow_percent && value->data[0].v_int == GIMP_UNIT_PERCENT)
-    {
-      value->data[0].v_int = value->data[0].v_int;
-    }
-  else
+  if (!(uspec->allow_percent && value->data[0].v_int == GIMP_UNIT_PERCENT))
     {
       value->data[0].v_int = CLAMP (value->data[0].v_int,
                                     ispec->minimum,