videorec: Fix flushing encoders
When passing NULL frames, encoders empty their queues, but we have
to stop polling from them when they don't any more data.
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bug #1] - Fixed simultaneous pressing of two arrow buttons on mobile
Fix TechRacer not recoding finish if time was >= 100s by raising this limit ten times.
Break up the hog/object collision. Currently is $7F, allowing 128 overlapping objects accurately. Breaking it up into 15 for hogs, 7 for other objects. I'm thinking the overall accuracy should be just fine as far as people noticing even with a ton of overlapping hogs, and this way we can tell the difference between a hog and "something else". For experiment and rope-breaking purposes, make rope pass through hogs.
fix and/or screwup that was causing girders in tunnels to erase the tunnel. also a little bit of indentation/case fixing