Fix multisegment SD resizing #25
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Fix SD multisegment resizing where PointResize() was used all the time, rendering Lanczos4Resize() useless and certain video segments too sharp when resized.
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The current code for SD multisegment resizing had PointResize() being used even if the current segment had dimensions that were less than 100% bigger (2x size). This led to sharp resizing artifacts that Lanczos4Rezize() should have covered up but didn't. This should fix it. Addresses issue #24