fix Sentence and AnnotatedSentence cloning: preserve ids

CMakeLists.txt

@@ -2,7 +2,7 @@ PROJECT(Corpus2Library)
 
 set(corpus2_ver_major "1")
 set(corpus2_ver_minor "2")
-set(corpus2_ver_patch "1")
+set(corpus2_ver_patch "2")
 
 cmake_minimum_required(VERSION 2.8.0)
 

libcorpus2/ann/annotatedsentence.cpp

@@ -34,7 +34,7 @@ AnnotatedSentence::~AnnotatedSentence()
 Sentence::Ptr AnnotatedSentence::clone_shared() const
 {
 	boost::shared_ptr<AnnotatedSentence> copy;
-	copy = boost::make_shared<AnnotatedSentence>();
+	copy = boost::make_shared<AnnotatedSentence>(id_);
 	BOOST_FOREACH(const Token* t, tokens_) {
 		copy->append(t->clone());
 	}

libcorpus2/sentence.cpp

@@ -33,7 +33,7 @@ Sentence::~Sentence()
 
 Sentence::Ptr Sentence::clone_shared() const
 {
-	Sentence::Ptr s = boost::make_shared<Sentence>();
+	Sentence::Ptr s = boost::make_shared<Sentence>(id_);
 	BOOST_FOREACH(const Token* t, tokens_) {
 		s->append(t->clone());
 	}