Fix build with clang

include/Types.h

@@ -11,7 +11,7 @@ class IMetadataService;
 class IMovie;
 class IShow;
 class IShowEpisode;
-class sqlite3;
+struct sqlite3;
 
 typedef std::shared_ptr<IFile> FilePtr;
 typedef std::shared_ptr<ILabel> LabelPtr;

src/SqliteTools.h

@@ -81,7 +81,7 @@ class SqliteTools
         {
             auto dbConnection = dbConnectionWeak.lock();
             if ( dbConnection == nullptr )
-                return false;
+                return nullptr;
 
             std::shared_ptr<T> result;
             auto stmt = prepareRequest( dbConnection, req, args... );