cargo contract check fails due to "No such file or directory"

[cmichi]

Tested with latest master:

$ cargo run -- contract new fails
$ cd fails/
$ cargo contract check                                                          
...
 [2/2] Post processing wasm file
ERROR: Loading original wasm file '/tmp/fails/target/ink/wasm32-unknown-unknown/release/fails.wasm'

Caused by:
    Can't read from the file: Os { code: 2, kind: NotFound, message: "No such file or directory" }

Same with our ink! rc3 examples.

[ascjones]

I think check should not even attempt to run the optimize step at all.

[cmichi]

Fixed with #180.