[libxml2] Cleanup conditional section error handling

[Daniel Veillard <veillard src gnome org>]

commit 9b8512337d14c8ddf662fcb98b0135f225a1c489
Author: Daniel Veillard <veillard redhat com>
Date:   Mon Feb 23 11:29:20 2015 +0800

    Cleanup conditional section error handling
    
    For https://bugzilla.gnome.org/show_bug.cgi?id=744980
    
    The error handling of Conditional Section also need to be
    straightened as the structure of the document can't be
    guessed on a failure there and it's better to stop parsing
    as further errors are likely to be irrelevant.

 parser.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/parser.c b/parser.c
index bbe97eb..fe603ac 100644
--- a/parser.c
+++ b/parser.c
@@ -6770,6 +6770,8 @@ xmlParseConditionalSections(xmlParserCtxtPtr ctxt) {
        SKIP_BLANKS;
        if (RAW != '[') {
            xmlFatalErr(ctxt, XML_ERR_CONDSEC_INVALID, NULL);
+           xmlStopParser(ctxt);
+           return;
        } else {
            if (ctxt->input->id != id) {
                xmlValidityError(ctxt, XML_ERR_ENTITY_BOUNDARY,
@@ -6830,6 +6832,8 @@ xmlParseConditionalSections(xmlParserCtxtPtr ctxt) {
        SKIP_BLANKS;
        if (RAW != '[') {
            xmlFatalErr(ctxt, XML_ERR_CONDSEC_INVALID, NULL);
+           xmlStopParser(ctxt);
+           return;
        } else {
            if (ctxt->input->id != id) {
                xmlValidityError(ctxt, XML_ERR_ENTITY_BOUNDARY,
@@ -6885,6 +6889,8 @@ xmlParseConditionalSections(xmlParserCtxtPtr ctxt) {
 
     } else {
        xmlFatalErr(ctxt, XML_ERR_CONDSEC_INVALID_KEYWORD, NULL);
+       xmlStopParser(ctxt);
+       return;
     }
 
     if (RAW == 0)