Ensure the include path is built from the current path (avoid inclusion mixups when executing libraries from testing scripts)

main/inc/lib/main_api.lib.php

@@ -485,7 +485,8 @@ function api_get_path($path_type) {
 		case INCLUDE_PATH :
 			// Generated by main/inc/global.inc.php
 			// example: /var/www/dokeos/main/inc/
-			return str_replace('\\', '/', $GLOBALS['includePath']).'/';
+            $incpath = realpath(dirname(__FILE__).'/../');
+            return str_replace('\\', '/', $incpath).'/';
 			break;
 
 		case LIBRARY_PATH :