fix warnings

Author: sfackler

openssl/src/ssl/bio.rs

@@ -183,7 +183,7 @@ unsafe extern "C" fn destroy<S>(bio: *mut BIO) -> c_int {
 
     let data = BIO_get_data(bio);
     assert!(!data.is_null());
-    Box::<StreamState<S>>::from_raw(data as *mut _);
+    let _ = Box::<StreamState<S>>::from_raw(data as *mut _);
     BIO_set_data(bio, ptr::null_mut());
     BIO_set_init(bio, 0);
     1

openssl/src/ssl/mod.rs

@@ -542,7 +542,7 @@ unsafe extern "C" fn free_data_box<T>(
     _argp: *mut c_void,
 ) {
     if !ptr.is_null() {
-        Box::<T>::from_raw(ptr as *mut T);
+        let _ = Box::<T>::from_raw(ptr as *mut T);
     }
 }