issue #2405 update smarty

and made Piwigo compatible with smarty 5.x

include/smarty/src/Compile/Modifier/WordWrapModifierCompiler.php

@@ -0,0 +1,27 @@
+<?php
+namespace Smarty\Compile\Modifier;
+/**
+ * Smarty wordwrap modifier plugin
+ * Type:     modifier
+ * Name:     wordwrap
+ * Purpose:  wrap a string of text at a given length
+ *
+ * @author Uwe Tews
+ */
+
+class WordWrapModifierCompiler extends Base {
+
+	public function compile($params, \Smarty\Compiler\Template $compiler) {
+		if (!isset($params[ 1 ])) {
+			$params[ 1 ] = 80;
+		}
+		if (!isset($params[ 2 ])) {
+			$params[ 2 ] = '"\n"';
+		}
+		if (!isset($params[ 3 ])) {
+			$params[ 3 ] = 'false';
+		}
+		return 'smarty_mb_wordwrap(' . $params[ 0 ] . ',' . $params[ 1 ] . ',' . $params[ 2 ] . ',' . $params[ 3 ] . ')';
+	}
+
+}