Improve XML serialization, URI parsing, and XPath node set processing.

third_party/libxml/src/uri.c

Index: third_party/libxml/src/uri.c
diff --git a/third_party/libxml/src/uri.c b/third_party/libxml/src/uri.c
index 2bd5720de97ca09277141be181d05ff2fe1a2e5a..4b24b1365a01ee18a32488d76b140189634582fc 100644
--- a/third_party/libxml/src/uri.c
+++ b/third_party/libxml/src/uri.c
@@ -12,6 +12,7 @@
 #include "libxml.h"
 
 #include <string.h>
+#include <limits.h>
 
 #include <libxml/xmlmemory.h>
 #include <libxml/uri.h>
@@ -334,7 +335,7 @@ xmlParse3986Port(xmlURIPtr uri, const char **str)
 	    cur++;
 	}
 	if (uri != NULL)
-	    uri->port = port & INT_MAX; /* port value modulo INT_MAX+1 */
+	    uri->port = port & USHRT_MAX; /* port value modulo USHRT_MAX+1 */
 	*str = cur;
 	return(0);
     }