This fixes Orig Dimension display (mostly).
* orx, ory both didn't get calculated, if dimension already matched
* putting them into Strip instead of StripData ment, that using images
of different dimensions in one strip could lead to incorrect results
Still TODO: on file open, timeline display happens before preview
display which means: orig_width and height are calculated after the
first draw of N-keys dialog. You have to hit refresh (or scrub one
frame) to get the right values displayed.
510920a299