[libhandy] glade: Correctly define init-function as an element

[Alexander Mikhaylenko <alexm src gnome org>]

commit b6a3a7cabdf4a07d82efc5c8c3abde6e16da928e
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sat Jun 20 10:24:31 2020 +0200

    glade: Correctly define init-function as an element
    
    This is needed to correctly call the init function for a catalog.

 glade/glade-catalog.dtd | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/glade/glade-catalog.dtd b/glade/glade-catalog.dtd
index 027962f1..c0d073e5 100644
--- a/glade/glade-catalog.dtd
+++ b/glade/glade-catalog.dtd
@@ -1,4 +1,5 @@
-<!ELEMENT glade-catalog (glade-widget-classes?, 
+<!ELEMENT glade-catalog (init-function?,
+                         glade-widget-classes?,
                          glade-widget-group*)>
 
 <!ATTLIST glade-catalog name     CDATA #REQUIRED
@@ -9,7 +10,6 @@
                         domain   CDATA #IMPLIED
                         book     CDATA #IMPLIED
                         icon-prefix CDATA #IMPLIED
-                        init-function CDATA #IMPLIED
                         requires CDATA #IMPLIED>
 
 <!ELEMENT glade-widget-classes (glade-widget-class+)>
@@ -192,3 +192,5 @@
                  name      CDATA #REQUIRED
                  stock     CDATA #IMPLIED
                  important CDATA #IMPLIED>
+
+<!ELEMENT init-function (#PCDATA)>