Fix cppcheck warnings in gs232.c

gs232a/gs232.c

@@ -107,7 +107,7 @@ transaction_write:
         goto transaction_quit;
     }
 
-#if 0
+#ifdef XXREMOVEDXX
 
     /* Check that command termination is correct */
     if (strchr(REPLY_EOM, data[strlen(data) - 1]) == NULL)