Fix x width mapping when 720x480 mode is forced using -M1
When the ch7036_monitor code is run with the -M1 flag to force
720x480@60 the aspect ratio cannot be computed (because it is non-standard)
this causes the width remapping to index -1 in the array and get bogus
width data.
This is fixed by not remapping when the aspect is negative.
BUG=chrome-os-partner:2850
TEST=sudo ch7036_monitor -v -M1 check picture remains when monitor attached
Change-Id: Ic0c55bba544b5a890bdeba37a36f85cb28f9c533
Review URL: http://codereview.chromium.org/6693053
1 file changed
