[glib] Fix gschema.dtd regarding flags

[Philip Withnall <pwithnall src gnome org>]

commit 0d59878bcedf200f836f3798948948724dcec623
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Tue Dec 5 05:49:43 2017 +0100

    Fix gschema.dtd regarding flags
    
    https://bugzilla.gnome.org/show_bug.cgi?id=791235

 gio/gschema.dtd |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gio/gschema.dtd b/gio/gschema.dtd
index 00e3a16..efe2d11 100644
--- a/gio/gschema.dtd
+++ b/gio/gschema.dtd
@@ -1,4 +1,4 @@
-<!ELEMENT schemalist (schema|enum)* >
+<!ELEMENT schemalist (schema|enum|flags)* >
 <!ATTLIST schemalist gettext-domain CDATA #IMPLIED >
 
 <!ELEMENT schema (key|child|override)* >