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FS#918 - mplayer moves by itself in a diagonal direction when Movie-Aspect is undefined
Steps to reproduce:
1. Download "http://hotfile.com/dl/122724438/6fc76d1/SmthVideo.vc1.html" 
2. mplayer -vc ffvc1 SmthVideo.vc1
What i get:
Mplayer moves by itself on a diagonal,
when it reaches the end of the screen
it goes up again to fit in screen,
and it goes on and on.
Mplayer output displays a lot of:
Movie-Aspect is undefined - no prescaling applied.
 Stream captured from http://www.rai.tv/ using the firefox addon at
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