[mutter] Accept an empty string as well as "disabled" for keybindings

[Owen Taylor <otaylor src gnome org>]

commit 4d62977c7b83ac7d6dd02eddca3f3269e5308525
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Fri Nov 20 10:19:03 2009 -0500

    Accept an empty string as well as "disabled" for keybindings
    
    Treat the empty string the same as "disabled" for GConf keybinding
    keys. gnome-keybinding-properties was changed to write disabled
    keys as the empty string a year or so ago.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=559816

 src/ui/ui.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/ui/ui.c b/src/ui/ui.c
index 7f2fac5..1d10352 100644
--- a/src/ui/ui.c
+++ b/src/ui/ui.c
@@ -773,7 +773,7 @@ meta_ui_parse_accelerator (const char          *accel,
   *keycode = 0;
   *mask = 0;
 
-  if (strcmp (accel, "disabled") == 0)
+  if (!accel[0] || strcmp (accel, "disabled") == 0)
     return TRUE;
   
   meta_ui_accelerator_parse (accel, &gdk_sym, &gdk_code, &gdk_mask);
@@ -860,7 +860,7 @@ meta_ui_parse_modifier (const char          *accel,
   
   *mask = 0;
 
-  if (accel == NULL || strcmp (accel, "disabled") == 0)
+  if (accel == NULL || !accel[0] || strcmp (accel, "disabled") == 0)
     return TRUE;
   
   meta_ui_accelerator_parse (accel, &gdk_sym, &gdk_code, &gdk_mask);