[MIR] Handle FatPtr in mir::constant::trans_constval.

[luqmana]

Fixes #30479.

[rust-highfive]

r? @nikomatsakis

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[nagisa]

LGTM.

[dotdash]

@bors r+

[bors]

📌 Commit 0f860c2 has been approved by dotdash

[bors]

⌛ Testing commit 0f860c2 with merge f16041b...

[bors]

💔 Test failed - auto-win-gnu-32-opt

[alexcrichton]

@bors: retry

On Sun, Dec 20, 2015 at 3:00 AM, bors [email protected] wrote:

[image: 💔] Test failed - auto-win-gnu-32-opt
http://buildbot.rust-lang.org/builders/auto-win-gnu-32-opt/builds/2477

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#30482 (comment).

[bors]

⌛ Testing commit 0f860c2 with merge 2b8e96d...

[bors]

☀️ Test successful - auto-linux-32-nopt-t, auto-linux-32-opt, auto-linux-64-debug-opt, auto-linux-64-nopt-t, auto-linux-64-opt, auto-linux-64-x-android-t, auto-linux-cross-opt, auto-linux-musl-64-opt, auto-mac-32-opt, auto-mac-64-nopt-t, auto-mac-64-opt, auto-win-gnu-32-nopt-t, auto-win-gnu-32-opt, auto-win-gnu-64-nopt-t, auto-win-gnu-64-opt, auto-win-msvc-32-opt, auto-win-msvc-64-opt