Actually add instantiate-maybe-invalid fuzz target (#2190)

Forgot to add it to the manifest so it didn't actually get built!

fuzz/Cargo.toml

@@ -107,3 +107,9 @@ name = "instantiate-wasm-smith"
 path = "fuzz_targets/instantiate-wasm-smith.rs"
 test = false
 doc = false
+
+[[bin]]
+name = "instantiate-maybe-invalid"
+path = "fuzz_targets/instantiate-maybe-invalid.rs"
+test = false
+doc = false

fuzz/fuzz_targets/instantiate-maybe-invalid.rs

@@ -2,14 +2,14 @@
 
 use libfuzzer_sys::fuzz_target;
 use std::time::Duration;
-use wasm_smith::Module;
+use wasm_smith::MaybeInvalidModule;
 use wasmtime::Strategy;
 use wasmtime_fuzzing::oracles;
 
 fuzz_target!(|module: MaybeInvalidModule| {
     oracles::instantiate_with_config(
         &module.to_bytes(),
-        wasmtime_fuzzing::fuzz_default_config(Strategy::Auto),
+        wasmtime_fuzzing::fuzz_default_config(Strategy::Auto).unwrap(),
         Some(Duration::from_secs(20)),
     );
 });