[librest] Don't dump XML parsing errors to stderr/stdout by default

[Christophe Fergeau <teuf src gnome org>]

commit 9fa3f055e43ec07e0c0198647d3454a585c32db7
Author: Christophe Fergeau <cfergeau redhat com>
Date:   Fri Mar 13 18:07:26 2015 +0100

    Don't dump XML parsing errors to stderr/stdout by default
    
    These errors should only be shown if REST_DEBUG=xml-parser is set.

 rest/rest-xml-parser.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/rest/rest-xml-parser.c b/rest/rest-xml-parser.c
index 4447a1a..4dec10d 100644
--- a/rest/rest-xml-parser.c
+++ b/rest/rest-xml-parser.c
@@ -40,6 +40,15 @@ rest_xml_parser_init (RestXmlParser *self)
 {
 }
 
+static void
+rest_xml_parser_xml_reader_error (void *arg,
+                                  const char *msg,
+                                  xmlParserSeverities severity,
+                                  xmlTextReaderLocatorPtr locator)
+{
+  REST_DEBUG(XML_PARSER, "%s", msg);
+}
+
 /**
  * rest_xml_parser_new:
  *
@@ -93,6 +102,7 @@ rest_xml_parser_parse_from_data (RestXmlParser *parser,
                                NULL, /* URL? */
                                NULL, /* encoding */
                                XML_PARSE_RECOVER | XML_PARSE_NOCDATA);
+  xmlTextReaderSetErrorHandler(reader, rest_xml_parser_xml_reader_error, NULL);
 
   while (xmlTextReaderRead (reader) == 1)
   {