message: revert unit test fixes
diff: @@ -4,16 +4,14 @@ extern crate libc;
  #[macro_use]
  extern crate log;
  extern crate futures;
  -extern crate indy_sys;
  -use self::libc::c_char;
  +use self::libc::{c_void, c_char};
  use std::ptr::null;
  use vcx::api::logger::*;
  use vcx::utils::logger::{LOGGER_STATE, LoggerState};
  use indy::wallet;
  use vcx::utils::cstring::CStringUtils;
  use vcx::api::logger::vcx_set_logger;
  -use self::indy_sys::CVoid;
  /// These tests can only be run individually as initing the log crate can happen
  /// only once.
  @@ -26,7 +24,7 @@ mod log_tests {
  use indy::future::Future;
  static mut COUNT: u32 = 0;
  - extern fn custom_log(_context: *const CVoid,
  + extern fn custom_log(_context: *const c_void,
  _level: u32,
  _target: *const c_char,
  message: *const c_char,
  