+ Add indexer destructor (to avoid compilation warning with "non-virtual destructor")

src/common/kiwix/indexer.cpp

@@ -54,6 +54,10 @@ namespace kiwix {
     pthread_mutex_init(&verboseMutex, NULL);
   }
 
+  /* Destructor */
+  Indexer::~Indexer() {
+  }
+
   /* Read the stopwords */
   void Indexer::readStopWords(const string languageCode) {
     std::string stopWord;

src/common/kiwix/indexer.h

@@ -62,6 +62,8 @@ namespace kiwix {
     
   public:
     Indexer();
+    virtual ~Indexer();
+
     bool start(const string zimPath, const string indexPath);
     bool stop();
     bool isRunning();

src/common/kiwix/xapianIndexer.cpp

@@ -28,7 +28,7 @@ namespace kiwix {
     this->indexer.set_stemmer(this->stemmer);
     */ 
   }
-  
+
   void XapianIndexer::indexingPrelude(const string indexPath) {
     this->writableDatabase = Xapian::WritableDatabase(indexPath, Xapian::DB_CREATE_OR_OVERWRITE);
     this->writableDatabase.begin_transaction(true);