Compile error with writing geometry collections

[kylebarron]

Compiling in release mode and uncommenting writing of geometry collections from within write_geometry we get a compile error.

This can be seen with cargo bench --bench parse:

> cargo bench --bench parse
   Compiling wkb v0.1.0 (/Users/kyle/github/kylebarron/wkb)
error[E0275]: overflow evaluating the requirement `&mut Vec<u8>: std::io::Write`
  |
  = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`parse`)
  = note: required for `&mut &mut Vec<u8>` to implement `std::io::Write`
  = note: 127 redundant requirements hidden
  = note: required for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut ...` to implement `std::io::Write`
  = note: required for `&mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut &mut ...` to implement `byteorder::io::WriteBytesExt`
  = note: the full name for the type has been written to '/Users/kyle/github/kylebarron/wkb/target/release/deps/parse-3a868d0a8d116a29.long-type-4795899411957364792.txt'
  = note: consider using `--verbose` to print the full type name to the console
  = note: the full name for the type has been written to '/Users/kyle/github/kylebarron/wkb/target/release/deps/parse-3a868d0a8d116a29.long-type-4795899411957364792.txt'
  = note: consider using `--verbose` to print the full type name to the console

For more information about this error, try `rustc --explain E0275`.
error: could not compile `wkb` (bench "parse") due to 1 previous error

[kylebarron]

As a note this only shows up in release mode from calling code. It's not an issue to compile with the library itself, ie in cargo check