[yelp] Fix implicit funcation declaration warning

[David King <davidk src gnome org>]

commit 1775265772a6f76649a3a633d3e4b54c72105a09
Author: David King <amigadave amigadave com>
Date:   Mon Feb 9 10:36:15 2015 +0000

    Fix implicit funcation declaration warning

 libyelp/yelp-help-list.c        |    1 +
 libyelp/yelp-mallard-document.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/libyelp/yelp-help-list.c b/libyelp/yelp-help-list.c
index 4a5c870..1085ef8 100644
--- a/libyelp/yelp-help-list.c
+++ b/libyelp/yelp-help-list.c
@@ -29,6 +29,7 @@
 #include <libxml/parser.h>
 #include <libxml/xinclude.h>
 #include <libxml/xpath.h>
+#include <libxml/xpathInternals.h>
 
 #include "yelp-help-list.h"
 #include "yelp-settings.h"
diff --git a/libyelp/yelp-mallard-document.c b/libyelp/yelp-mallard-document.c
index 92b54b4..d43a492 100644
--- a/libyelp/yelp-mallard-document.c
+++ b/libyelp/yelp-mallard-document.c
@@ -28,6 +28,7 @@
 #include <libxml/parser.h>
 #include <libxml/parserInternals.h>
 #include <libxml/xinclude.h>
+#include <libxml/xpathInternals.h>
 
 #include "yelp-error.h"
 #include "yelp-mallard-document.h"