Fix empty image 'src' causing a faulty double request
Fix empty image 'src' causing a faulty double request

Initialize the img 'src' with a tiny transparent pixel graphic rather than leaving it empty by default. This fixes a faulty double request to the containing page itself causing a 'Resource interpreted as Image but transferred with MIME type text/html.' warning in Safari/ WebKit.
HashtagPurvi/lightbox2,michael50602/lightbox2,nhduong29/lightbox2,neerajreddy92/lightbox2,WeBest/lightbox2,jochouen/lightbox2,yajinn/lightbox2,raybrad/lightbox2,raybrad/lightbox2,nhduong29/lightbox2,janusnic/lightbox2,easingthemes/lightbox2,jhedgcock/lightbox2,lokesh/lightbox2,gitkiselev/lightbox2,tataabumova/lightbox2,sunfun/lightbox2,nuclearwessel/lightbox2,danielchikaka/lightbox2,michael50602/lightbox2,janusnic/lightbox2,sunfun/lightbox2,jochouen/lightbox2