[libxml2] Fix a couple of issues raised by make dist

[Daniel Veillard <veillard src gnome org>]

commit 7a72f4afd5b3f57e3fd1097461cc3416061cf6ff
Author: Daniel Veillard <veillard redhat com>
Date:   Mon Oct 13 16:23:24 2014 +0800

    Fix a couple of issues raised by make dist

 include/libxml/tree.h |    4 ++--
 xmlIO.c               |    7 +++++++
 2 files changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/include/libxml/tree.h b/include/libxml/tree.h
index d194596..2f90717 100644
--- a/include/libxml/tree.h
+++ b/include/libxml/tree.h
@@ -658,7 +658,7 @@ struct _xmlDOMWrapCtxt {
     defined(LIBXML_SCHEMAS_ENABLED) || defined(LIBXML_DEBUG_ENABLED) || \
     defined (LIBXML_HTML_ENABLED) || defined(LIBXML_SAX1_ENABLED) || \
     defined(LIBXML_HTML_ENABLED) || defined(LIBXML_WRITER_ENABLED) || \
-    defined(LIBXML_DOCB_ENABLED)
+    defined(LIBXML_DOCB_ENABLED) || defined(LIBXML_LEGACY_ENABLED)
 XMLPUBFUN int XMLCALL
                xmlValidateNCName       (const xmlChar *value,
                                         int space);
@@ -949,7 +949,7 @@ XMLPUBFUN xmlNodePtr XMLCALL
                                         xmlNodePtr cur);
 #endif /* defined(LIBXML_TREE_ENABLED) || defined(LIBXML_WRITER_ENABLED) */
 #if defined(LIBXML_TREE_ENABLED) || defined(LIBXML_HTML_ENABLED) || \
-    defined(LIBXML_SCHEMAS_ENABLED)
+    defined(LIBXML_SCHEMAS_ENABLED) || defined(LIBXML_XINCLUDE_ENABLED)
 XMLPUBFUN xmlNodePtr XMLCALL
                xmlAddPrevSibling       (xmlNodePtr cur,
                                         xmlNodePtr elem);
diff --git a/xmlIO.c b/xmlIO.c
index 0e1092d..e628ab0 100644
--- a/xmlIO.c
+++ b/xmlIO.c
@@ -800,6 +800,13 @@ xmlCheckFilename (const char *path)
     return 1;
 }
 
+/**
+ * xmlNop:
+ *
+ * No Operation function, does nothing, no input
+ *
+ * Returns zero
+ */
 int
 xmlNop(void) {
     return(0);