Fix missing condition to recognize https in vChamilo plugin

plugin/vchamilo/lib/Virtual.php

@@ -123,9 +123,13 @@ class Virtual
             $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https' || !empty($_configuration['force_https_forwarded_proto'])
         ) {
             $protocol = 'https';
+        } else {
+            if ($_SERVER['HTTPS']) {
+                $protocol = 'https';
             } else {
                 $protocol = 'http';
             }
+        }
 
         if (defined('CLI_VCHAMILO_OVERRIDE')) {
             $_configuration['vchamilo_web_root'] = CLI_VCHAMILO_OVERRIDE;