An improvement to use PDFJS and Google viewer with relative path

I've made a code personalizzation, with PDFJS and Google viewer, that adds the site url if a relative url is specified.
So articles that uses pdf_embed plugin are more portable.
For example if you must change the site domain, it is not necessary to change all pdf_embed calls into the articles.

file: pdf_embed.php

public function plg_pdfembed_replacer($ploc, $w, $h, $viewer)

...

			case "google":

				if (strpos($ploc, 'http') !== 0) $ploc = JURI::root(true) . $ploc;

				$ploc = urlencode($ploc);

...



			case "pdfjs":

				if (strpos($ploc, 'http') !== 0) $ploc = JURI::root(true) . $ploc;

				$ploc = urlencode($ploc);

...