[aisleriot] build: Fix --enable-debug-ui help

[Jeremy Bicha <jbicha src gnome org>]

commit 364db3cb7c3cca2ea77cb33dff7bd468b5ce39ca
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Sun Jan 6 15:18:35 2019 -0500

    build: Fix --enable-debug-ui help
    
    The correct configure flag is --enable-debug-ui not --debug-ui
    
    Closes: https://gitlab.gnome.org/GNOME/aisleriot/issues/12

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index 64c8b251..c8e9de01 100644
--- a/configure.ac
+++ b/configure.ac
@@ -252,7 +252,7 @@ AC_DEFINE_UNQUOTED([AR_CARD_THEME_DEFAULT_FORMAT_STRING],["$with_default_card_th
 
 AC_MSG_CHECKING([whether extra debugging UI in Aisleriot is requested])
 AC_ARG_ENABLE([debug-ui],
-  [AS_HELP_STRING([--debug-ui],[Enable extra debugging UI in Aisleriot (default: disabled)])],
+  [AS_HELP_STRING([--enable-debug-ui],[Enable extra debugging UI in Aisleriot (default: disabled)])],
   [],[enable_debug_ui=no])
 AC_MSG_RESULT([$enable_debug_ui])