[gupnp] Make use of AS_HELP_STRING

[Jens Georg <jensgeorg src gnome org>]

commit 9654eff96d54f548d65f4134364a50e5eff5f2cc
Author: Ludovic Ferrandis <ludovic ferrandis linux intel com>
Date:   Fri May 25 10:47:12 2012 +0200

    Make use of AS_HELP_STRING
    
    https://bugzilla.gnome.org/show_bug.cgi?id=676803

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 1e7964d..9fd040e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -121,7 +121,7 @@ AC_SUBST(GLIB_GENMARSHAL)
 
 # Debugging
 AC_ARG_ENABLE(debug,
-	[  --enable-debug          enable debugging],,
+        AS_HELP_STRING([--enable-debug], [enable debugging]),,
         enable_debug=no)
 if test "x$enable_debug" = "xyes"; then
         CFLAGS="$CFLAGS -g -Wall -Werror"