add count default value

app/views/checkout.phtml

@@ -111,7 +111,7 @@
                 </div>
 
                 <div>
-                    <p><input name="count" id="count" type="number" value="<?=post_value("count")?>" min="1" max="999" onclick="itog();"> штук</p>
+                    <p><input name="count" id="count" type="number" value="<?=post_value("count", 1)?>" min="1" max="999" onclick="itog();"> штук</p>
                 </div>    
 
                 <div id="form_pay">