Return local error type on VR init

src/vr.rs

@@ -47,7 +47,7 @@ impl From<vr::InitError> for Error {
 }
 
 impl VR {
-  pub fn new() -> Result<VR, vr::InitError> {
+  pub fn new() -> Result<VR, Error> {
     let context = unsafe { vr::init(vr::ApplicationType::Scene)? };
     Ok(VR {
       system: context.system()?,