[mutter] prefs: Handle the new META_PREF_DYNAMIC_WORKSPACES enum value

[Rui Matos <rtcm src gnome org>]

commit 1d98f1fee8e1e674f6ea54b6043b41742a9de055
Author: Rui Matos <tiagomatos gmail com>
Date:   Mon Mar 12 01:00:47 2012 +0100

    prefs: Handle the new META_PREF_DYNAMIC_WORKSPACES enum value
    
    Avoids a -Werror compiler error.

 src/core/prefs.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/core/prefs.c b/src/core/prefs.c
index 58ee473..7721203 100644
--- a/src/core/prefs.c
+++ b/src/core/prefs.c
@@ -1628,6 +1628,9 @@ meta_preference_to_string (MetaPreference pref)
 
     case META_PREF_DRAGGABLE_BORDER_WIDTH:
       return "DRAGGABLE_BORDER_WIDTH";
+
+    case META_PREF_DYNAMIC_WORKSPACES:
+      return "DYNAMIC_WORKSPACES";
     }
 
   return "(unknown)";