[Database] fix build on ubuntu 14.04

src/database/Artist.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Emeric Poupon
+ * Copyright (C) 2015 Emeric Poupon
  *
  * This file is part of LMS.
  *
@@ -17,7 +17,7 @@
  * along with LMS.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "Artist.hpp"
+#include "Types.hpp"
 #include "SqlQuery.hpp"
 
 #include "logger/Logger.hpp"