Fix compilation problems for paths on Linux (#33)

Paths with attributes are now emitted for Japanese,
but there were compilation problems with Japanese paths on Linux.

modules/engine/src/engine.cpp

@@ -276,7 +276,7 @@ static void iKnowEngineOutputCallback(iknow::core::IkIndexOutput* data, iknow::c
 				PropertyId entity_vector_prop_id = kb->PropertyIdForName(kEntityVectorTypeName);
 				iknowdata::Attribute a_type = static_cast<iknowdata::Attribute>(entity_vector_prop_id);
 
-				sentence_data.sent_attributes.push_back(Sent_Attribute(a_type, NULL, NULL, string())); // generate entity vector marker
+				sentence_data.sent_attributes.push_back(Sent_Attribute(a_type)); // generate entity vector marker
 				// sentence_data.sent_attributes.back().entity_ref = static_cast<unsigned short>(sentence_data.entities.size()); // connect sentence attribute to entity
 
 				for (IkSentence::EntityVector::const_iterator i = entity_vector.begin(); i != entity_vector.end(); ++i) { // collect entity id's

modules/engine/src/engine.h

@@ -109,7 +109,10 @@ namespace iknowdata { // to bundle all generated data
 		Sent_Attribute(Attribute att_type,
 			size_t start, size_t stop, 
 			std::string& marker
-		) : type_(att_type), offset_start_(start), offset_stop_(stop), marker_(marker) {}
+		) : type_(att_type), offset_start_(start), offset_stop_(stop), marker_(marker), entity_ref(0) {}
+
+		Sent_Attribute(Attribute att_type) : // Entity Vector attributes, no markers, no corresponding offsets
+			type_(att_type), offset_start_(NULL), offset_stop_(NULL), entity_ref(0) {}
 
 		Attribute type_;
 		size_t offset_start_, offset_stop_; // these refer to offsets in the text, "start" is where the textual representation starts, "stop" is where it stops.