Fix compatibility with older PHP versions by not using empty(fn())

plugins/emoticons/emoticons.php

@@ -175,10 +175,10 @@ class emoticons extends rcube_plugin
         $dont_override = $rcube->config->get('dont_override', array());
 
         if ($args['section'] == 'mailview' && !in_array('emoticons_display', $dont_override)) {
-            $args['prefs']['emoticons_display'] = !empty(rcube_utils::get_input_value('_emoticons_display', rcube_utils::INPUT_POST));
+            $args['prefs']['emoticons_display'] = rcube_utils::get_input_value('_emoticons_display', rcube_utils::INPUT_POST) ? true : false;
         }
         else if ($args['section'] == 'compose' && !in_array('emoticons_compose', $dont_override)) {
-            $args['prefs']['emoticons_compose'] = !empty(rcube_utils::get_input_value('_emoticons_compose', rcube_utils::INPUT_POST));
+            $args['prefs']['emoticons_compose'] = rcube_utils::get_input_value('_emoticons_compose', rcube_utils::INPUT_POST) ? true : false;
         }
 
         return $args;

plugins/newmail_notifier/newmail_notifier.php

@@ -159,7 +159,7 @@ class newmail_notifier extends rcube_plugin
         foreach (array('basic', 'desktop', 'sound') as $type) {
             $key = 'newmail_notifier_' . $type;
             if (!in_array($key, $dont_override)) {
-                $args['prefs'][$key] = !empty(rcube_utils::get_input_value('_' . $key, rcube_utils::INPUT_POST));
+                $args['prefs'][$key] = rcube_utils::get_input_value('_' . $key, rcube_utils::INPUT_POST) ? true : false;
             }
         }