[gtk-doc] configure: use more compatible options for highlight more often

[Stefan Kost <stefkost src gnome org>]

commit 525f3c41d98ba5d145dba18a72ed1920875fd8ef
Author: Will Thompson <will thompson collabora co uk>
Date:   Wed Apr 20 18:56:57 2011 +0100

    configure: use more compatible options for highlight more often
    
    24b3544 only changed one of the two locations where the options are
    specified.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=648331

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 72f2b0f..8cc240e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -137,7 +137,7 @@ else
 
 	case $with_highlight in
 		source-highlight) HIGHLIGHT_OPTIONS="-t4 -sc -cstyle.css --no-doc -i";;
-		highlight) HIGHLIGHT_OPTIONS="-X -f --class-name=gtkdoc ";;
+		highlight) HIGHLIGHT_OPTIONS="--out-format=xhtml -f --class-name=gtkdoc ";;
 		vim)
 			AC_MSG_CHECKING([whether vim has +syntax feature])
 			if $HIGHLIGHT --version | grep '+syntax' >/dev/null; then