Remove zero-sized struct warning. #106.

[rthomas]

This change will fix the remaining warnings in servo/core-text-rs#62 when it is released and the core-text crate is updated.

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This change is 

[rthomas]

@jdm fyi.

[jdm]

Want to increase the version number in Cargo.toml as well so we can publish after merging the changes?

[rthomas]

Ack, will do for core-graphics as well.

[rthomas]

I've bumped the version number.

[jdm]

@bors-servo: r+

[bors-servo]

📌 Commit 4c83733 has been approved by jdm

[bors-servo]

⌛ Testing commit 4c83733 with merge ca298a9...

[bors-servo]

💔 Test failed - status-travis

[jdm]

error: use of extern static requires unsafe function or block (error E0133)

   --> src/runloop.rs:128:45

    |

128 |         run_loop.add_timer(&run_loop_timer, kCFRunLoopDefaultMode);

    |                                             ^^^^^^^^^^^^^^^^^^^^^

    |

    = note: #[deny(safe_extern_statics)] on by default

    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!

    = note: for more information, see issue #36247 <https://github.com/rust-lang/rust/issues/36247>

error: aborting due to previous error

error: Could not compile `core-foundation`.

Want to fix this too?

[rthomas]

Yep, will take a look.

[jdm]

@bors-servo: r+

[bors-servo]

📌 Commit a37ecf5 has been approved by jdm

[bors-servo]

⌛ Testing commit a37ecf5 with merge 5895274...

[rthomas]

Pushed a commit to the PR that fixes this - as it was in the tests I figured wrapping the invocation in unsafe was acceptable.

[bors-servo]

☀️ Test successful - status-travis
Approved by: jdm
Pushing 5895274 to master...