Piwik noscript ssl

i’m using a “dynamic” piwik embedding in a wordpress multisite environment where the blog ids are mapped to the piwik site ids

some of the pages are http some are https

normaly piwik’s tracking code depends on the document’s protocol
(… var u=((“https:” == document.location.protocol) ? “https” : “http”) …)

but what about the noscript tag

here we have to choose for http or https

so why not using // instead of http:// or https:// in the img src?

anything against it?