show 'days' in preferences

src/de/schatenseite/android/waldemar/WaldemarPreferences.java

@@ -91,7 +91,7 @@ public class WaldemarPreferences extends PreferenceActivity {
         });
         pref_duration.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
         	public boolean onPreferenceChange(Preference preference, Object newValue) {
-        		pref_duration.setSummary((CharSequence)newValue);
+        		pref_duration.setSummary((CharSequence)newValue+" "+getApplicationContext().getString(R.string.days));
         		return true;
         	}
         });