Avoid unused variable warning on non-Windows platforms.

diff --git a/serialport.c b/serialport.c
index 781fbdec0e8cea83fe31b45bd1386e36dbab3297..c53a639008fa19e0543d9ea77ced7c19c8c18da4 100644 (file)
--- a/serialport.c
+++ b/serialport.c
@@ -563,5 +563,7 @@ void sp_free_error_message(char *message)
 {
 #ifdef _WIN32
        LocalFree(message);
+#else
+       (void)message;
 #endif
 }