Fix compile error from latest nightly (2014-11-18)
Fix compile error from latest nightly (2014-11-18)

Fixes:

```
lib.rs:499:29: 499:37 error: mismatched types: expected
`&[device::Handle<u32, device::shade::Stage>]`, found
`[device::Handle<u32, device::shade::Stage>, ..2]` (expected &-ptr,
found array of 2 elements)
lib.rs:499         self.create_program([vs, fs]).map_err(|e|
ProgramError::Link(e))
```

alexcrichton/gfx,aepsil0n/gfx-rs,ColinKinloch/gfx,gfx-rs/gfx-rs,mitchmindtree/gfx-rs,tanderegg/gfx,bvssvni/gfx-rs,ColinKinloch/gfx,JohnColanduoni/gfx,Bastacyclop/gfx,JohnColanduoni/gfx,red75prime/gfx,tempbottle/gfx,davll/gfx,sectopod/gfx-rs,tanderegg/gfx