[gdm] configure: require --without-plymouth to disable plymouth support

[Ray Strode <halfline src gnome org>]

commit 0950c62478a338189f3e50d3dd6e19c2b9d4de3b
Author: Ray Strode <rstrode redhat com>
Date:   Fri Dec 19 08:52:40 2014 -0500

    configure: require --without-plymouth to disable plymouth support
    
    Plymouth is used pretty widely these days, and we're getting bugs
    from people who didn't have the buildrequires, didn't get plymouth
    support and were left with a broken setup.
    
    Instead, just just let the distros that don't use plymouth opt out.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=740802

 configure.ac |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a567a82..e2ec4e2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -263,8 +263,8 @@ AC_ARG_ENABLE(wayland-support,
 
 AC_ARG_WITH(plymouth,
             AS_HELP_STRING([--with-plymouth],
-                           [Add plymouth support @<:@default=auto@:>@]),
-            [with_plymouth=$withval], [with_plymouth=auto])
+                           [Add plymouth support @<:@default=yes@:>@]),,
+                           [with_plymouth=yes])
 
 AC_ARG_WITH(at-spi-registryd-directory,
             AS_HELP_STRING([--with-at-spi-registryd-directory],