[gtk+] Add singleton for css number 1.0

[Alexander Larsson <alexl src gnome org>]

commit 7d21ec23f6a750f5a7fc2342e4522c0bf817a13a
Author: Alexander Larsson <alexl redhat com>
Date:   Wed Feb 6 14:28:20 2013 +0100

    Add singleton for css number 1.0
    
    This will be nice as this is will be the default for opacity.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=687842

 gtk/gtkcssnumbervalue.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkcssnumbervalue.c b/gtk/gtkcssnumbervalue.c
index 19a5f59..ed2bfe5 100644
--- a/gtk/gtkcssnumbervalue.c
+++ b/gtk/gtkcssnumbervalue.c
@@ -189,7 +189,10 @@ GtkCssValue *
 _gtk_css_number_value_new (double     value,
                            GtkCssUnit unit)
 {
-  static GtkCssValue zero_singleton = { &GTK_CSS_VALUE_NUMBER, 1, GTK_CSS_NUMBER, 0 };
+  static GtkCssValue number_singletons[] = {
+    { &GTK_CSS_VALUE_NUMBER, 1, GTK_CSS_NUMBER, 0 },
+    { &GTK_CSS_VALUE_NUMBER, 1, GTK_CSS_NUMBER, 1 },
+  };
   static GtkCssValue px_singletons[] = {
     { &GTK_CSS_VALUE_NUMBER, 1, GTK_CSS_PX, 0 },
     { &GTK_CSS_VALUE_NUMBER, 1, GTK_CSS_PX, 1 },
@@ -199,8 +202,8 @@ _gtk_css_number_value_new (double     value,
   };
   GtkCssValue *result;
 
-  if (unit == GTK_CSS_NUMBER && value == 0)
-    return _gtk_css_value_ref (&zero_singleton);
+  if (unit == GTK_CSS_NUMBER && (value == 0 || value == 1))
+    return _gtk_css_value_ref (&number_singletons[(int) value]);
 
   if (unit == GTK_CSS_PX &&
       (value == 0 ||