Fix undefined behavior

Fixes undefined behavior caused by the two lines being combined. If they
are combined, running `cargo test` will pass but `cargo test --release`
will result in the TDH.MNG.INIT SEAMCALL failing with an invalid
operand. XFAM if there's no print statements anywhere, and Attributes if
there are prints in the source code.

Signed-off-by: Jake Correnti <[email protected]>

src/launch/mod.rs

@@ -84,7 +84,8 @@ impl TdxVm {
             }
         }
 
-        let mut cmd = Cmd::from(&InitVm::new(&cpuid_entries));
+        let vm = InitVm::new(&cpuid_entries);
+        let mut cmd = Cmd::from(&vm);
         unsafe {
             fd.encrypt_op(&mut cmd)?;
         }