Fix unused return warning for 'transmute_copy'.

diff --git a/lightning-invoice/src/lib.rs b/lightning-invoice/src/lib.rs
index 2164f1c530fccc6b30dbaa632a8087311a255fdd..b6abecf3256d7a6c580e6e5cfe40594fc899b96c 100644 (file)
--- a/lightning-invoice/src/lib.rs
+++ b/lightning-invoice/src/lib.rs
@@ -117,7 +117,7 @@ pub const DEFAULT_MIN_FINAL_CLTV_EXPIRY: u64 = 18;
 fn __system_time_size_check() {
        // Use 2 * sizeof(u64) as expected size since the expected underlying implementation is storing
        // a `Duration` since `SystemTime::UNIX_EPOCH`.
-       unsafe { core::mem::transmute_copy::<SystemTime, [u8; 16]>(&SystemTime::UNIX_EPOCH); }
+       unsafe { let _ = core::mem::transmute_copy::<SystemTime, [u8; 16]>(&SystemTime::UNIX_EPOCH); }
 }