fix(uhyve): sign fix for exit hypercall

Author: fogti

src/syscalls/interfaces/uhyve.rs

@@ -31,7 +31,7 @@ fn data_addr<T>(data: &T) -> u64 {
 #[inline]
 fn hypercall_data(hypercall: &Hypercall<'_>) -> u64 {
 	match hypercall {
-		Hypercall::Exit(exit_code) => u64::try_from(*exit_code).unwrap(),
+		Hypercall::Exit(exit_code) => (*exit_code) as u64,
 		Hypercall::FileClose(data) => data_addr(*data),
 		Hypercall::FileLseek(data) => data_addr(*data),
 		Hypercall::FileOpen(data) => data_addr(*data),