get correct user for paths to the trash bin, needed for remote shares if the size of of trash gets calculated

apps/files_encryption/lib/helper.php

@@ -293,8 +293,8 @@ class Helper {
 	public static function getUserFromPath($path) {
 		$split = self::splitPath($path);
 
-		if (count($split) > 3 && (
-			$split[2] === 'files' || $split[2] === 'files_versions' || $split[2] === 'cache')) {
+		if (count($split) > 2 && (
+			$split[2] === 'files' || $split[2] === 'files_versions' || $split[2] === 'cache' || $split[2] === 'files_trashbin')) {
 
 			$user = $split[1];
 

apps/files_encryption/tests/helper.php

@@ -219,6 +219,7 @@ class TestHelper extends TestCase {
 		return array(
 			array('/' . self::TEST_ENCRYPTION_HELPER_USER1 . '/files/foo.txt', self::TEST_ENCRYPTION_HELPER_USER1),
 			array('//' . self::TEST_ENCRYPTION_HELPER_USER2 . '/files_versions/foo.txt', self::TEST_ENCRYPTION_HELPER_USER2),
+			array('/' . self::TEST_ENCRYPTION_HELPER_USER1 . '/files_trashbin/', self::TEST_ENCRYPTION_HELPER_USER1),
 			array(self::TEST_ENCRYPTION_HELPER_USER1 . '//cache/foo/bar.txt', self::TEST_ENCRYPTION_HELPER_USER1),
 		);
 	}