mx-offscreen: Always use an aspect ratio of 1.0 for the perspective
mx-offscreen: Always use an aspect ratio of 1.0 for the perspective

The code for calculating modelview matrix no longer works since
Clutter changed the aspect ratio for its perspective matrix. This
patch changes it to override the aspect ratio back to 1.0 so that it
will continue to work.

http://bugzilla.clutter-project.org/show_bug.cgi?id=2658

jonnylamb/mx,clutter-project/mx,pwithnall/mx,jonnylamb/mx,pwithnall/mx,pwithnall/mx,clutter-project/mx,pwithnall/mx,clutter-project/mx,jonnylamb/mx,clutter-project/mx,jonnylamb/mx