fs: btrfs: Fix typo in error message

%s/occured/occurred/

Signed-off-by: Naoki Hayama <naoki.hayama@lineo.co.jp>
Reviewed-by: Marek BehĂșn <kabel@kernel.org>
Reviewed-by: Qu Wenruo <wqu@suse.com>
diff --git a/fs/btrfs/btrfs.c b/fs/btrfs/btrfs.c
index cbf9dcf..e48972f 100644
--- a/fs/btrfs/btrfs.c
+++ b/fs/btrfs/btrfs.c
@@ -150,7 +150,7 @@
 	}
 	ret = btrfs_iter_dir(root, ino, show_dir);
 	if (ret < 0) {
-		error("An error occured while listing directory %s", path);
+		error("An error occurred while listing directory %s", path);
 		return ret;
 	}
 	return 0;
@@ -257,7 +257,7 @@
 
 	ret = btrfs_file_read(root, ino, offset, len, buf);
 	if (ret < 0) {
-		error("An error occured while reading file %s", file);
+		error("An error occurred while reading file %s", file);
 		return ret;
 	}