fix/revert the unsigned-shift change made to clamp in 3836. For clamp we want to see the negatives, so we must have a signed shift.
fix/revert the unsigned-shift change made to clamp in 3836. For clamp we want
to see the negatives, so we must have a signed shift.



git-svn-id: e8541e15acce502a64c929015570ad1648e548cd@3839 2bbb7eff-a529-9590-31e7-b0007b416f81

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