Fix for bug 291827 (Expat's byte position is bogus if a chunk boundary falls before we block). r/sr=bz, a=bsmedberg.

git-svn-id: svn://10.0.0.236/trunk@176607 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/parser/expat/lib/xmlparse.c

@@ -1568,8 +1568,11 @@ XML_ParseBuffer(XML_Parser parser, int len, int isFinal)
   }
 /* BEGIN MOZILLA CHANGE (Blocking parser) */
   else if (errorCode == XML_ERROR_SUSPENDED) {
+    int unparsed = bufferEnd - eventEndPtr;
     bufferPtr = eventPtr;
     parseEndPtr = eventEndPtr;
+    bufferEnd -= unparsed; /* Substract what we haven't parsed */
+    parseEndByteIndex -= unparsed;
     XmlUpdatePosition(encoding, positionPtr, eventEndPtr, &position);
     return XML_STATUS_ERROR;
   }