switch from @count() to empty(). Empty checks if the value is set where as count doesn't and causes errors. Similar to 305bf858c1 (#681)

allow StdClass to be cast to array when compiling foreach, to prevent invalid count warning in PHP 7.2+

README.md

@@ -1,5 +1,5 @@
-#Smarty 2 template engine
-##Distribution repository
+# Smarty 2 template engine
+## Distribution repository
 Starting with Smarty 2.6.23 Composer has been configured to load the packages from github.
  
 **NOTE: Because of this change you must clear your local composer cache with the "composer clearcache" command**

libs/Smarty.class.php

@@ -1208,7 +1208,7 @@ class Smarty
                         $_server_vars = ($this->request_use_auto_globals) ? $_SERVER : $GLOBALS['HTTP_SERVER_VARS'];
                         $_last_modified_date = @substr($_server_vars['HTTP_IF_MODIFIED_SINCE'], 0, strpos($_server_vars['HTTP_IF_MODIFIED_SINCE'], 'GMT') + 3);
                         $_gmt_mtime = gmdate('D, d M Y H:i:s', $this->_cache_info['timestamp']).' GMT';
-                        if (@count($this->_cache_info['insert_tags']) == 0
+                        if (empty($this->_cache_info['insert_tags'])
                             && !$this->_cache_serials
                             && $_gmt_mtime == $_last_modified_date) {
                             if (php_sapi_name()=='cgi')

libs/Smarty_Compiler.class.php

@@ -1192,7 +1192,7 @@ class Smarty_Compiler extends Smarty {
         }
 
         $output = '<?php ';
-        $output .= "\$_from = $from; if (!is_array(\$_from) && !is_object(\$_from)) { settype(\$_from, 'array'); }";
+        $output .= "\$_from = $from; if ((\$_from instanceof StdClass) || (!is_array(\$_from) && !is_object(\$_from))) { settype(\$_from, 'array'); }";
         if (isset($name)) {
             $foreach_props = "\$this->_foreach[$name]";
             $output .= "{$foreach_props} = array('total' => count(\$_from), 'iteration' => 0);\n";