[metacity] theme: make meta_gradient_spec_validate static

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 6a5c8d26eb8da418e9f3b4056c667701b70d583a
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Jan 24 11:48:26 2016 +0200

    theme: make meta_gradient_spec_validate static

 src/ui/theme-parser.c  |   17 +++++++++++++++++
 src/ui/theme-private.h |    2 --
 src/ui/theme.c         |   17 -----------------
 3 files changed, 17 insertions(+), 19 deletions(-)
---
diff --git a/src/ui/theme-parser.c b/src/ui/theme-parser.c
index 0d36b4e..8a47181 100644
--- a/src/ui/theme-parser.c
+++ b/src/ui/theme-parser.c
@@ -3771,6 +3771,23 @@ meta_theme_validate (MetaTheme *theme,
   return TRUE;
 }
 
+static gboolean
+meta_gradient_spec_validate (MetaGradientSpec *spec,
+                             GError          **error)
+{
+  g_return_val_if_fail (spec != NULL, FALSE);
+
+  if (g_slist_length (spec->color_specs) < 2)
+    {
+      g_set_error (error, META_THEME_ERROR,
+                   META_THEME_ERROR_FAILED,
+                   _("Gradients should have at least two colors"));
+      return FALSE;
+    }
+
+  return TRUE;
+}
+
 static void
 end_element_handler (GMarkupParseContext *context,
                      const gchar         *element_name,
diff --git a/src/ui/theme-private.h b/src/ui/theme-private.h
index 1259a2f..490bc33 100644
--- a/src/ui/theme-private.h
+++ b/src/ui/theme-private.h
@@ -780,8 +780,6 @@ GdkPixbuf             *meta_gradient_spec_render               (const MetaGradie
                                                                 GtkStyleContext             *widget,
                                                                 int                          width,
                                                                 int                          height);
-gboolean               meta_gradient_spec_validate             (MetaGradientSpec            *spec,
-                                                                GError                     **error);
 
 MetaAlphaGradientSpec *meta_alpha_gradient_spec_new            (MetaGradientType             type,
                                                                 int                          n_alphas);
diff --git a/src/ui/theme.c b/src/ui/theme.c
index c46d00b..ef9d439 100644
--- a/src/ui/theme.c
+++ b/src/ui/theme.c
@@ -1248,23 +1248,6 @@ meta_gradient_spec_render (const MetaGradientSpec *spec,
   return pixbuf;
 }
 
-gboolean
-meta_gradient_spec_validate (MetaGradientSpec *spec,
-                             GError          **error)
-{
-  g_return_val_if_fail (spec != NULL, FALSE);
-
-  if (g_slist_length (spec->color_specs) < 2)
-    {
-      g_set_error (error, META_THEME_ERROR,
-                   META_THEME_ERROR_FAILED,
-                   _("Gradients should have at least two colors"));
-      return FALSE;
-    }
-
-  return TRUE;
-}
-
 MetaAlphaGradientSpec*
 meta_alpha_gradient_spec_new (MetaGradientType       type,
                               int                    n_alphas)