This makes the color matrix and component transfer Moz2D filters generate
an infinite output, which is then cropped to the primitive's filter
primitive subregion by a subsequent crop filter node. This still gives us
different behavior than other browser when the primitive subregion is
overridden using the x/y/width/height attributes - other browsers either
ignore those completely (IE) or only let them crop the default subregion
(which is defined to be the same as the input subregion) and not enlargen
it - but I'll fix that in a separate bug.
Chris Peterson
Markus Stange