improve manufacturer block content

Application/views/blocks/page/details/inc/details_tabs_invite.html.tpl

@@ -3,8 +3,10 @@
 [{assign var="registry" value="\OxidEsales\Eshop\Core\Registry"|@oxNew}]
 [{assign var="oConfig" value=$registry->getConfig()}]
 [{assign var="oManufacturer" value=$oView->getManufacturer()}]
-[{assign var="sShopURL"      value=$oConfig->getConfigParam('sShopURL')}]
-[{assign var="description"   value=$oManufacturer->d3GetLongdesc()}]
+[{if $oManufacturer && $oManufacturer->getId()}]
+    [{assign var="oConfig"       value=$oViewConf->getConfig()}]
+    [{assign var="sShopURL"      value=$oConfig->getConfigParam('sShopURL')}]
+    [{assign var="description"   value=$oManufacturer->d3GetLongdesc()}]
 
 [{if $oManufacturer && $oConfig->getConfigParam('d3manufacturerinformation_showManufacturertextOnDetailsPage') && $description|strip_tags|trim}]
     [{capture append="tabs"}]<a href="#manufacturertab" class="nav-link" data-toggle="tab">[{oxmultilang ident="MANUFACTURER"}]</a>[{/capture}]