ZF-11301: set "minimum" param to value when no value present

- Fixes issue with both horizontal and vertical slider dijits

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@23933 44c647ce-9c0f-0410-b52a-842ac1e357ba

library/Zend/Dojo/View/Helper/Slider.php

@@ -77,7 +77,12 @@ abstract class Zend_Dojo_View_Helper_Slider extends Zend_Dojo_View_Helper_Dijit
         }
 
         $content = '';
-        $params['value'] = $value;
+        // check required for IE
+        if (null === $value) {
+            $params['value'] = $params['minimum'];
+        } else {
+            $params['value'] = $value;
+        }
 
         if (!array_key_exists('onChange', $attribs)) {
             $attribs['onChange'] = "dojo.byId('" . $id . "').value = arguments[0];";