Revert "Remove unused mutates parameters, since we base our work on what the command claims"

This reverts commit 6b6ccee575.

src/libtomahawk/database/Database.cpp

@@ -42,7 +42,7 @@ Database::Database( const QString& dbname, QObject* parent )
     : QObject( parent )
     , m_ready( false )
     , m_impl( new DatabaseImpl( dbname ) )
-    , m_workerRW( new DatabaseWorker( this ) )
+    , m_workerRW( new DatabaseWorker( this, true ) )
 {
     s_instance = this;
 
@@ -100,7 +100,7 @@ Database::enqueue( const QSharedPointer<DatabaseCommand>& lc )
         // create new thread if < WORKER_THREADS
         if ( m_workers.count() < m_maxConcurrentThreads )
         {
-            DatabaseWorker* worker = new DatabaseWorker( this );
+            DatabaseWorker* worker = new DatabaseWorker( this, false );
             worker->start();
 
             m_workers << worker;

src/libtomahawk/database/DatabaseWorker.cpp

@@ -34,11 +34,14 @@
     //#define DEBUG_TIMING TRUE
 #endif
 
-DatabaseWorker::DatabaseWorker( Database* db )
+DatabaseWorker::DatabaseWorker( Database* db, bool mutates )
     : QThread()
     , m_db( db )
     , m_outstanding( 0 )
 {
+    Q_UNUSED( db );
+    Q_UNUSED( mutates );
+
     moveToThread( this );
 
     qDebug() << "CTOR DatabaseWorker" << this->thread();

src/libtomahawk/database/DatabaseWorker.h

@@ -39,7 +39,7 @@ class DatabaseWorker : public QThread
 Q_OBJECT
 
 public:
-    DatabaseWorker( Database* );
+    DatabaseWorker( Database*, bool mutates );
     ~DatabaseWorker();
 
     bool busy() const { return m_outstanding > 0; }