SocialSharing: updated sharing_img to use PS_LOGO as an URL instead f…

…ile path

This is related to thirtybees#5

socialsharing.php

@@ -240,7 +240,7 @@ public function hookDisplayCompareExtraInformation($params)
                     "'"
                 ),
                 'sharing_img'  => addcslashes(
-                    _PS_IMG_DIR_.Configuration::get('PS_LOGO_MAIL', null, null, $this->context->shop->id), "'"
+                    $this->context->link->getMediaLink(_PS_IMG_.Configuration::get('PS_LOGO')), "'"
                 ),
             ]
         );