Opera's -o-device-pixel-ratio query

Follow https://github.com/yui/yuicompressor/blob/master/src/com/yahoo/platform/yui/compressor/CssCompressor.java line 449
Test passed with:
@media print,
       (-o-min-device-pixel-ratio: 5/4),
       (-webkit-min-device-pixel-ratio: 1.25),
       (min-resolution: 120dpi) {
    /*comment*/
}