json-lexer: reset the lexer state on an invalid token

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

json-lexer.c

@@ -305,6 +305,9 @@ static int json_lexer_feed_char(JSONLexer *lexer, char ch)
             new_state = IN_START;
             break;
         case IN_ERROR:
+            QDECREF(lexer->token);
+            lexer->token = qstring_new();
+            new_state = IN_START;
             return -EINVAL;
         default:
             break;