[layout] Focal length is incorrect for portrait images

[James Legg]

In gsoc2009_layout, the focal length shown on the camera and lens tab does not match up with the focal length from trunk. This occurs when the image is a portrait fisheye image. The focal length is out by the aspect ratio.

[rew (r-e-wolff)]

Tested: I took two shots, one rotated 90 degrees. My images happen to be frames from a movie so, they don't have exif. If put in 40.5 degrees FOV for the portrait image. and 65 degrees for the landscape image. Both images show a focal length on the order of 29 mm. (correct!).

But one Image renders completely wrong.

To reproduce:
  http://prive.bitwizard.nl/test_ls.jpg
  http://prive.bitwizard.nl/test_pt.jpg

and enter the above FOV's for the images (40.5 for the pt and 65 for the other).
Next click align.

Tested on Pre-Release 2010.4.0.1e3fcb26cf9e

[Yuv (yuv)]

Tested on 2016.0.0~rc2+sfsg-1ubuntu1~trusty Xubuntu 14.04LTS

following the process in comment #1, the images now align and render well, however they end up in the nadir (using the Assistant / Simple Interface).