bn256: fix gfp12 MulScalar

[kc1212]

Previously MulScalar was ignoring the first parameter, which was inconsistent with gfp6 and gfp2.

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[kc1212]

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This PR (HEAD: ec40c04) has been imported to Gerrit for code review.

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Message from Bryan C. Mills:

Patch Set 1:

(1 comment)

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Message from Adam Langley:

Patch Set 1: Run-TryBot+1 Code-Review+2

Thank you for this. I'm going to say that a test isn't needed because there's no externally-observable behaviour change: this is a typo in an internal function, but it didn't matter because that function was never used in a way where it mattered. Still, worth a small change to fix it.

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TryBots beginning. Status page: https://farmer.golang.org/try?commit=fd12b1c6

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Patch Set 1: TryBot-Result+1

TryBots are happy.

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This PR is being closed because golang.org/cl/154457 has been merged.