media empty selection: add string for errormessage

lang/UTF-8/serendipity_lang_fi.inc.php

@@ -618,6 +618,7 @@
 @define('FETCH_METHOD_HOTLINK', 'Linkitä kohdepalvelimelta');
 @define('GO_ADD_PROPERTIES', 'Go & enter properties');
 @define('PLAIN_ASCII_NAMES', '(no special characters, umlauts)');
+@define('NO_FILE_SELECTED', 'For s9y to do something, you have to select a file first');
 
 /* ADMIN - MEDIA_PANE.TPL */
 @define('IMAGE_RESIZE', 'Muokkaa kuvan kokoa');