[gnome-builder] xml-pack: add missing GType declaration

[Christian Hergert <chergert src gnome org>]

commit 1cf368f1dce0eda7d67ac8c44360592f395d3c04
Author: Christian Hergert <chergert redhat com>
Date:   Fri Jun 15 18:21:02 2018 -0700

    xml-pack: add missing GType declaration

 src/plugins/xml-pack/ide-xml-hash-table.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/plugins/xml-pack/ide-xml-hash-table.h b/src/plugins/xml-pack/ide-xml-hash-table.h
index 7f47e8a10..2412b2a6c 100644
--- a/src/plugins/xml-pack/ide-xml-hash-table.h
+++ b/src/plugins/xml-pack/ide-xml-hash-table.h
@@ -20,7 +20,7 @@
 
 #include <libxml/xmlstring.h>
 
-#include <glib.h>
+#include <glib-object.h>
 
 G_BEGIN_DECLS
 
@@ -44,6 +44,7 @@ typedef void (*IdeXmlHashTableArrayScanFunc) (const gchar *name,
                                               GPtrArray   *array,
                                               gpointer     data);
 
+GType                ide_xml_hash_table_get_type    (void);
 IdeXmlHashTable     *ide_xml_hash_table_new         (GDestroyNotify                free_func);
 gboolean             ide_xml_hash_table_add         (IdeXmlHashTable              *self,
                                                      const gchar                  *name,