Added composer patch to get.php, ref. OpenMage#3453 (OpenMage#3476)

get.php

@@ -28,20 +28,30 @@
 /**
  * Set include path
  */
-
+$paths = [];
 $paths[] = $bp . $ds . 'app' . $ds . 'code' . $ds . 'local';
 $paths[] = $bp . $ds . 'app' . $ds . 'code' . $ds . 'community';
 $paths[] = $bp . $ds . 'app' . $ds . 'code' . $ds . 'core';
 $paths[] = $bp . $ds . 'lib';
 
 $appPath = implode($ps, $paths);
 set_include_path($appPath . $ps . get_include_path());
-
 include_once 'Mage/Core/functions.php';
 include_once 'Varien/Autoload.php';
 
 Varien_Autoload::register();
 
+/** AUTOLOADER PATCH **/
+$autoloaderPath = getenv('COMPOSER_VENDOR_PATH');
+if (!$autoloaderPath) {
+    $autoloaderPath = dirname($bp) . $ds .  'vendor';
+    if (!is_dir($autoloaderPath)) {
+        $autoloaderPath = $bp . $ds . 'vendor';
+    }
+}
+require $autoloaderPath . $ds . 'autoload.php';
+/** AUTOLOADER PATCH **/
+
 $varDirectory = $bp . $ds . Mage_Core_Model_Config_Options::VAR_DIRECTORY;
 
 $configCacheFile = $varDirectory . $ds . 'resource_config.json';