Fixed up a bug where the song import progress dialog would show up and not disappear if a user did not select any song databases to import.

openlp/plugins/songs/songsplugin.py

@@ -258,6 +258,8 @@ class SongsPlugin(Plugin):
         for sfile in os.listdir(db_dir):
             if sfile.startswith(u'songs_') and sfile.endswith(u'.sqlite'):
                 song_dbs.append(os.path.join(db_dir, sfile))
+        if len(song_dbs) == 0:
+            return
         progress = QtGui.QProgressDialog(self.formparent)
         progress.setWindowModality(QtCore.Qt.WindowModal)
         progress.setLabelText(translate('OpenLP.Ui', 'Starting import...'))