Fix dprintf conformance
@@ -37,7 +37,7 @@ PHLIBAPI extern ULONG WindowsVersion;
// Debugging
#ifdef DEBUG
-#define dprintf(format, ...) DbgPrint(format, __VA_ARGS__)
+#define dprintf(format, ...) DbgPrint(format, ##__VA_ARGS__)
#else
#define dprintf(format, ...)
#endif
