Bug 7665 - Bibs with no ISBN's show broken images for covers when using Syndetics...

Bug 7665 - Bibs with no ISBN's show broken images for covers when using Syndetics cover images

Patch fixes problem for syndetics + bibs with no ISBN. Also adds "no image found" capability to Syndetics results.

To test (first, contact me and I will let you use my syndetics credentials *for testing this bug only*):
* replicate bug - have a bib with an ISBN, and one without. The one with the ISBN should show a cover, the one without will show a broken image.
* apply patch
* search for the same bib - you should now see "no image available" for the one with no ISBN, and a cover image for your bib with an ISBN.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Ian Walls <koha.sekjal@gmail.com>
QA Comment:  normalized spacing

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>