Merge pull request #265 from compnerd/test

tests: fix test build
diff --git a/tests/dispatch_queue_finalizer.c b/tests/dispatch_queue_finalizer.c
index 9c16e7e..e75733f 100644
--- a/tests/dispatch_queue_finalizer.c
+++ b/tests/dispatch_queue_finalizer.c
@@ -50,7 +50,7 @@
 {
 	dispatch_test_start("Dispatch Queue Finalizer");
 
-#if DISPATCH_SIZEOF_PTR == 8
+#if defined(__LP64__) || defined(_WIN64)
 	ctxt_magic = (void*)((uintptr_t)arc4random() << 32 | arc4random());
 #else
 	ctxt_magic = (void*)arc4random();