[gtkhtml] Build against gtk+-3.0 when running distcheck.

[Matthew Barnes <mbarnes src gnome org>]

commit c53919f87b6b18418cc937765b9f420390e8175a
Author: Matthew Barnes <mbarnes redhat com>
Date:   Tue Jun 29 08:51:26 2010 -0400

    Build against gtk+-3.0 when running distcheck.

 Makefile.am |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index d3ba8b1..1969247 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,5 +1,7 @@
 ACLOCAL_AMFLAGS=-I m4
 
+DISTCHECK_CONFIGURE_FLAGS = --enable-gtk3
+
 SUBDIRS =					\
 	a11y					\
 	gtkhtml					\
@@ -31,7 +33,6 @@ MAINTAINERCLEANFILES =				\
 	$(srcdir)/m4/ltversion.m4		\
 	$(srcdir)/m4/lt~obsolete.m4
 
-
 EXTRA_DIST =					\
 	gtkhtml-zip.in				\
 	COPYING.LIB				\