message: feat(c-api) Shrink vector of traps.
  Ensure that the size of the vector of the instance's traps equals its
  capacity by shrinking it.
diff: @@ -45,6 +45,7 @@ pub unsafe extern "C" fn wasm_instance_new(
  let trap: Box<wasm_trap_t> = Box::new(runtime_error.into());
  let mut traps: Vec<*mut wasm_trap_t> = Vec::with_capacity(1);
  traps.push(Box::into_raw(trap));
  + traps.shrink_to_fit();
  let pointer = traps.as_mut_ptr();
  mem::forget(traps);
  