Test: width:70px; height:auto; width="0" height="0"
This testcase checks that the intrinsic height will be taken as the used
height when the CSS 'height' property is set to 'auto', the 'width'
property is set to some other value, and there is no intrinsic ratio. Since
the 'height' attribute is set to zero, nothing should be displayed. You
should not see any red when viewing this file.