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diff --git a/vendor/lsolesen/pel/src/PelEntrySByte.php b/vendor/lsolesen/pel/src/PelEntrySByte.php
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+++ b/vendor/lsolesen/pel/src/PelEntrySByte.php
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+<?php
+
+/**
+ * PEL: PHP Exif Library.
+ * A library with support for reading and
+ * writing all Exif headers in JPEG and TIFF images using PHP.
+ *
+ * Copyright (C) 2004, 2005, 2006, 2007 Martin Geisler.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program in the file COPYING; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301 USA
+ */
+namespace lsolesen\pel;
+
+/**
+ * Classes used to hold bytes, both signed and unsigned.
+ * The {@link
+ * PelEntryWindowsString} class is used to manipulate strings in the
+ * format Windows XP needs.
+ *
+ * @author Martin Geisler <mgeisler@users.sourceforge.net>
+ * @license http://www.gnu.org/licenses/gpl.html GNU General Public
+ *          License (GPL)
+ * @package PEL
+ */
+
+/**
+ * Class for holding signed bytes.
+ *
+ * This class can hold bytes, either just a single byte or an array of
+ * bytes. The class will be used to manipulate any of the Exif tags
+ * which has format {@link PelFormat::BYTE}.
+ *
+ * @author Martin Geisler <mgeisler@users.sourceforge.net>
+ * @package PEL
+ */
+class PelEntrySByte extends PelEntryNumber
+{
+
+    /**
+     * Make a new entry that can hold a signed byte.
+     *
+     * The method accept several integer arguments. The {@link getValue}
+     * method will always return an array except for when a single
+     * integer argument is given here.
+     *
+     * @param PelTag $tag
+     *            the tag which this entry represents. This
+     *            should be one of the constants defined in {@link PelTag}
+     *            which has format {@link PelFormat::BYTE}.
+     *
+     * @param int $value...
+     *            the byte(s) that this entry will represent.
+     *            The argument passed must obey the same rules as the argument to
+     *            {@link setValue}, namely that it should be within range of a
+     *            signed byte, that is between -128 and 127 (inclusive). If not,
+     *            then a {@link PelOverflowException} will be thrown.
+     */
+    public function __construct($tag, $value = null)
+    {
+        $this->tag = $tag;
+        $this->min = - 128;
+        $this->max = 127;
+        $this->format = PelFormat::SBYTE;
+
+        $value = func_get_args();
+        array_shift($value);
+        $this->setValueArray($value);
+    }
+
+    /**
+     * Convert a number into bytes.
+     *
+     * @param int $number
+     *            the number that should be converted.
+     *
+     * @param PelByteOrder $order
+     *            one of {@link PelConvert::LITTLE_ENDIAN} and
+     *            {@link PelConvert::BIG_ENDIAN}, specifying the target byte order.
+     *
+     * @return string bytes representing the number given.
+     */
+    public function numberToBytes($number, $order)
+    {
+        return chr($number);
+    }
+}