[zenity] option.c: Fixing typo in extra-button option

[Arx Henrique Pereira da Cruz <arxcruz src gnome org>]

commit fd024c53e67b55a8979f24952d5340a779248fe7
Author: Arx Cruz <arxcruz gnome org>
Date:   Tue Apr 21 14:59:29 2015 +0200

    option.c: Fixing typo in extra-button option

 src/option.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/option.c b/src/option.c
index 7ec4b63..6a95dea 100644
--- a/src/option.c
+++ b/src/option.c
@@ -872,7 +872,7 @@ static GOptionEntry question_options[] = {
     G_OPTION_FLAG_NOALIAS,
     G_OPTION_ARG_NONE,
     &zenity_question_switch,
-    N_("Supress ok and cancel buttons"),
+    N_("Suppress ok and cancel buttons"),
     NULL
   },
   {