OS X: Fix a few warnings

src/gui/folder.cpp

@@ -553,6 +553,7 @@ void Folder::slotWatchedPathChanged(const QString& path)
     // the sync is doing to filter out our own changes.
     bool ownChange = false;
 #ifdef Q_OS_MAC
+    Q_UNUSED(path)
     // On OSX the folder watcher does not report changes done by our
     // own process. Therefore nothing needs to be done here!
 #else

src/gui/folderwatcher_mac.cpp

@@ -47,11 +47,15 @@ static void callback(
         const FSEventStreamEventFlags eventFlags[],
         const FSEventStreamEventId eventIds[])
 {
+    Q_UNUSED(streamRef)
+    Q_UNUSED(eventFlags)
+    Q_UNUSED(eventIds)
+
     qDebug() << "FolderWatcherPrivate::callback by OS X";
 
     QStringList paths;
     CFArrayRef eventPaths = (CFArrayRef)eventPathsVoid;
-    for (int i = 0; i < numEvents; ++i) {
+    for (int i = 0; i < static_cast<int>(numEvents); ++i) {
         CFStringRef path = reinterpret_cast<CFStringRef>(CFArrayGetValueAtIndex(eventPaths, i));
 
         QString qstring;

src/libsync/utility.cpp

@@ -183,6 +183,7 @@ void Utility::setLaunchOnStartup(const QString &appName, const QString& guiName,
 qint64 Utility::freeDiskSpace(const QString &path, bool *ok)
 {
 #if defined(Q_OS_MAC) || defined(Q_OS_FREEBSD) || defined(Q_OS_FREEBSD_KERNEL) || defined(Q_OS_NETBSD)
+    Q_UNUSED(ok)
     struct statvfs stat;
     statvfs(path.toUtf8().data(), &stat);
     return (qint64) stat.f_bavail * stat.f_frsize;

src/libsync/utility_mac.cpp

@@ -69,6 +69,7 @@ bool hasLaunchOnStartup_private(const QString &)
 
 void setLaunchOnStartup_private(const QString &appName, const QString& guiName, bool enable)
 {
+    Q_UNUSED(appName)
     Q_UNUSED(guiName)
     QString filePath = QDir(QCoreApplication::applicationDirPath()+QLatin1String("/../..")).absolutePath();
     CFStringRef folderCFStr = CFStringCreateWithCString(0, filePath.toUtf8().data(), kCFStringEncodingUTF8);