Add test with <windows.h>. Refs #25.

test/Jamfile.v2

@@ -9,5 +9,6 @@ run crc_test.cpp
 run crc_test2.cpp ;
 
 run pr15_test.cpp ;
+compile issue25_test.cpp ;
 
 run quick.cpp ;

test/issue25_test.cpp

@@ -0,0 +1,20 @@
+// Copyright 2024 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt)
+
+#if !defined(_WIN32)
+
+#include <boost/config/pragma_message.hpp>
+
+BOOST_PRAGMA_MESSAGE( "Test skipped because _WIN32 is not defined" )
+
+#else
+
+#include <windows.h>
+#include <boost/crc.hpp>
+
+#endif
+
+int main()
+{
+}