Fix type hints and doc blocks

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

lib/private/Files/FileInfo.php

@@ -150,10 +150,10 @@ class FileInfo implements \OCP\Files\FileInfo, \ArrayAccess {
 	/**
 	 * Get FileInfo ID or null in case of part file
 	 *
-	 * @return int/null
+	 * @return int|null
 	 */
 	public function getId() {
-		return isset($this->data['fileid']) ? intval($this->data['fileid']) : null;
+		return isset($this->data['fileid']) ? (int)  $this->data['fileid'] : null;
 	}
 
 	/**
@@ -195,7 +195,7 @@ class FileInfo implements \OCP\Files\FileInfo, \ArrayAccess {
 	 */
 	public function getSize() {
 		$this->updateEntryfromSubMounts();
-		return isset($this->data['size']) ? intval($this->data['size']) : 0;
+		return isset($this->data['size']) ? (int) $this->data['size'] : 0;
 	}
 
 	/**
@@ -203,7 +203,7 @@ class FileInfo implements \OCP\Files\FileInfo, \ArrayAccess {
 	 */
 	public function getMTime() {
 		$this->updateEntryfromSubMounts();
-		return intval($this->data['mtime']);
+		return (int) $this->data['mtime'];
 	}
 
 	/**
@@ -219,18 +219,18 @@ class FileInfo implements \OCP\Files\FileInfo, \ArrayAccess {
 	 * @return int
 	 */
 	public function getEncryptedVersion() {
-		return isset($this->data['encryptedVersion']) ? intval($this->data['encryptedVersion']) : 1;
+		return isset($this->data['encryptedVersion']) ? (int) $this->data['encryptedVersion'] : 1;
 	}
 
 	/**
 	 * @return int
 	 */
 	public function getPermissions() {
-		$perms = $this->data['permissions'];
+		$perms = (int) $this->data['permissions'];
 		if (\OCP\Util::isSharingDisabledForUser() || ($this->isShared() && !\OC\Share\Share::isResharingAllowed())) {
 			$perms = $perms & ~\OCP\Constants::PERMISSION_SHARE;
 		}
-		return intval($perms);
+		return (int) $perms;
 	}
 
 	/**

lib/public/Files/FileInfo.php

@@ -144,7 +144,7 @@ interface FileInfo {
 	/**
 	 * Get the file id of the file or folder
 	 *
-	 * @return int
+	 * @return int|null
 	 * @since 7.0.0
 	 */
 	public function getId();