From 1bb88b374ec2415db02aa908fa966ba145929bdc Mon Sep 17 00:00:00 2001
From: Patrick Niklaus <patrick.niklaus@student.kit.edu>
Date: Wed, 4 May 2016 12:45:57 +0200
Subject: [PATCH] Make hint values optional, fixes issue 2356

---
 include/server/api/base_parameters_grammar.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/server/api/base_parameters_grammar.hpp b/include/server/api/base_parameters_grammar.hpp
index be7bdb916..6c0822a3b 100644
--- a/include/server/api/base_parameters_grammar.hpp
+++ b/include/server/api/base_parameters_grammar.hpp
@@ -134,7 +134,7 @@ struct BaseParametersGrammar : boost::spirit::qi::grammar<Iterator, Signature>
 
         hints_rule
             = qi::lit("hints=")
-            > qi::as_string[qi::repeat(engine::ENCODED_HINT_SIZE)[base64_char]][ph::bind(add_hint, qi::_r1, qi::_1)] % ';'
+            > -qi::as_string[qi::repeat(engine::ENCODED_HINT_SIZE)[base64_char]][ph::bind(add_hint, qi::_r1, qi::_1)] % ';'
             ;
 
         bearings_rule