Start with mountpoint as folder to talk selection if old value is invalid.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24704 a1c6a512-1295-4272-9138-f99709370657

rbutil/rbutilqt/installtalkwindow.cpp

@@ -50,7 +50,7 @@ void InstallTalkWindow::browseFolder()
     }
     else
     {
-        startfolder = "/media"; // FIXME: This looks Linux specific
+        startfolder = RbSettings::value(RbSettings::Mountpoint).toString();
     }
     selected = QFileDialog::getExistingDirectory(this,
             tr("Select folder to create talk files"), startfolder);