[x265] [PATCH] fix bug in asm code for weightp, the sintel_trailer's width is not multiple of 16

[chen]

>> # HG changeset patch
>> # User Min Chen <chenm003 at 163.com>
>> # Date 1390485088 -28800
>> # Node ID c93c9f313e2d8da2f2d11f15c1619c1a5e967533
>> # Parent  f1bd676fd90f5a9ac9353fcc164fc190786fd694
>> fix bug in asm code for weightp, the sintel_trailer's width is not multiple of 16
>
>I don't think the width can be a problem. We always apply the weight to a plane of reconstructed pixels which has borders extended. We could weight multiples of 32 or 64 and it would be ok.
>
>Did this change actually affect the outputs?  If so it indicates a bug.
>
on that sequence, we call weight function with non multiple width of 16, so our asm code output wrong result.
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