Fixed linker error when using VS2015 /MD

Without this change links under Visual Studio 2015 using the
/MDd switch ("multithreaded debug dll" c-runtime) fail with a "LNK2005:
__crt_debugger_hook already defined in msvcrtd.lib(utility_desktop.obj)"
error.

fipstest.cpp

@@ -21,7 +21,11 @@
 #else
 #define _CRT_DEBUGGER_HOOK __crt_debugger_hook
 #endif
+#if _MSC_VER < 1900
 extern "C" {_CRTIMP void __cdecl _CRT_DEBUGGER_HOOK(int);}
+#else
+extern "C" {void __cdecl _CRT_DEBUGGER_HOOK(int); }
+#endif
 #endif
 #endif