Fix comparisons in encryption app

Signed-off-by: Joas Schilling <coding@schilljs.com>

apps/encryption/lib/Crypto/Crypt.php

@@ -605,7 +605,7 @@ class Crypt {
 
 			$element = array_shift($exploded);
 
-			while ($element != self::HEADER_END) {
+			while ($element !== self::HEADER_END) {
 				$result[$element] = array_shift($exploded);
 				$element = array_shift($exploded);
 			}

apps/encryption/lib/Crypto/Encryption.php

@@ -449,13 +449,13 @@ class Encryption implements IEncryptionModule {
 			return false;
 		}
 
-		if ($parts[2] == 'files') {
+		if ($parts[2] === 'files') {
 			return true;
 		}
-		if ($parts[2] == 'files_versions') {
+		if ($parts[2] === 'files_versions') {
 			return true;
 		}
-		if ($parts[2] == 'files_trashbin') {
+		if ($parts[2] === 'files_trashbin') {
 			return true;
 		}