[Dillo-dev] auto/abs sizes in image.cc, auto/abs/per in textblock.cc

At http://naturalhistory.museumwales.ac.uk/sharpshooters/ two of the image tags specify a size for one dimension, giving it as 100%. When one dimension is auto and the other is percentage, it doesn't scale properly. I see that calculation using percentage has to be in textblock because it uses availWidth or availHeight, so... is there a deep need to keep the auto/abs case in Image's sizeRequestImpl instead of Textblock's calcWidgetSize? I was just playing with adding all of the cases to calcWidgetSize and it looked like it was working except that an unloaded image with, e.g., height=100% alt=whatever would end up ridiculously wide because height_of_page / height_of_alt_text * width_of_alt_text is a large number.