some fixes for sharing

apps/files_sharing/ajax/email.php

 <?php
-
-require_once('../../../lib/base.php');
-
 OC_JSON::checkLoggedIn();
 OC_JSON::checkAppEnabled('files_sharing');
 $user = OC_User::getUser();

apps/files_sharing/ajax/getitem.php

@@ -3,7 +3,7 @@
 
  
 OC_JSON::checkAppEnabled('files_sharing');
-require_once('../lib_share.php');
+require_once(OC::$APPSROOT . '/apps/files_sharing/lib_share.php');
 
 $userDirectory = "/".OC_User::getUser()."/files";
 $source = $userDirectory.$_GET['source'];

apps/files_sharing/ajax/setpermissions.php

@@ -3,7 +3,7 @@
 
  
 OC_JSON::checkAppEnabled('files_sharing');
-require_once('../lib_share.php');
+require_once(OC::$APPSROOT . '/apps/files_sharing/lib_share.php');
 
 $source = "/".OC_User::getUser()."/files".$_GET['source'];
 $uid_shared_with = $_GET['uid_shared_with'];

apps/files_sharing/ajax/share.php

@@ -3,7 +3,7 @@
 
  
 OC_JSON::checkAppEnabled('files_sharing');
-require_once('../lib_share.php');
+require_once(OC::$APPSROOT . '/apps/files_sharing/lib_share.php');
 
 $userDirectory = "/".OC_User::getUser()."/files";
 $sources = explode(";", $_POST['sources']);

apps/files_sharing/ajax/toggleresharing.php

 <?php
 
-require_once('../../../lib/base.php');
-
 OC_JSON::checkAppEnabled('files_sharing');
 OC_JSON::checkAdminUser();
 if ($_POST['resharing'] == true) {

apps/files_sharing/ajax/unshare.php

@@ -3,7 +3,7 @@
 
  
 OC_JSON::checkAppEnabled('files_sharing');
-require_once('../lib_share.php');
+require_once(OC::$APPSROOT . '/apps/files_sharing/lib_share.php');
 
 $source = "/".OC_User::getUser()."/files".$_GET['source'];
 $uid_shared_with = $_GET['uid_shared_with'];