[libnotify] Replace missing AC_SUBST to fix .pc file

[William Jon McCann <mccann src gnome org>]

commit f4e06fb372ef7701a144650acae2ab23415ee7a4
Author: William Jon McCann <jmccann redhat com>
Date:   Sat Oct 9 02:19:31 2010 -0400

    Replace missing AC_SUBST to fix .pc file

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 3943c92..0c6ec7e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -96,6 +96,7 @@ pkg_modules="gdk-pixbuf-2.0 glib-2.0 >= $REQ_GLIB_VERSION, dbus-1 >= $REQ_DBUS_V
 PKG_CHECK_MODULES(PACKAGE, [$pkg_modules])
 AC_SUBST(PACKAGE_LIBS)
 AC_SUBST(PACKAGE_CFLAGS)
+AC_SUBST(pkg_modules)
 
 tests_modules="gtk+-3.0 >= $REQ_GTK_VERSION dbus-glib-1 >= $REQ_DBUS_VERSION"
 PKG_CHECK_MODULES(TESTS, [$tests_modules])