crypto/ecdsa: change hashToBytes to use copy instead of calling another function

[pschou]

Resolve a TODO, remove a double function call

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Message from Paul Schou:

Patch Set 1:

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Message from Michael Munday:

Patch Set 1: Code-Review-1

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This PR (HEAD: 91a6ddf) has been imported to Gerrit for code review.

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Message from Paul Schou:

Patch Set 4:

(2 comments)

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This PR (HEAD: cf32f07) has been imported to Gerrit for code review.

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Message from Paul Schou:

Patch Set 5:

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This PR (HEAD: ff91df9) has been imported to Gerrit for code review.

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Message from Paul Schou:

Patch Set 6:

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Message from Paul Schou:

Patch Set 4:

(2 comments)

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Message from Paul Schou:

Patch Set 5:

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Message from Paul Schou:

Patch Set 6:

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Message from Paul Schou:

Patch Set 6:

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Message from Filippo Valsorda:

Patch Set 6:

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