minor: fixed errors in some defined __DOXYGEN__ guards
diff --git a/src/include/lwip/opt.h b/src/include/lwip/opt.h
index 8e5eeef..4e8cb71 100644
--- a/src/include/lwip/opt.h
+++ b/src/include/lwip/opt.h
@@ -2170,7 +2170,7 @@
/**
* LWIP_IPV6_REASS==1: reassemble incoming IPv6 packets that fragmented
*/
-#if !defined LWIP_IPV6_REASS || defined __DOXYGEN__ || defined __DOXYGEN__
+#if !defined LWIP_IPV6_REASS || defined __DOXYGEN__
#define LWIP_IPV6_REASS (LWIP_IPV6)
#endif
@@ -2348,7 +2348,7 @@
* LWIP_ND6_DELAY_FIRST_PROBE_TIME: Delay before first unicast neighbor solicitation
* message is sent, during neighbor reachability detection.
*/
-#if !defined LWIP_ND6_DELAY_FIRST_PROBE_TIME || defined __DOXYGEN__s
+#if !defined LWIP_ND6_DELAY_FIRST_PROBE_TIME || defined __DOXYGEN__
#define LWIP_ND6_DELAY_FIRST_PROBE_TIME 5000
#endif
@@ -2365,9 +2365,10 @@
* with reachability hints for connected destinations. This helps avoid sending
* unicast neighbor solicitation messages.
*/
-#if !defined LWIP_ND6_TCP_REACHABILITY_HINTS || defined __DOXYGEN__ || defined __DOXYGEN__
+#if !defined LWIP_ND6_TCP_REACHABILITY_HINTS || defined __DOXYGEN__
#define LWIP_ND6_TCP_REACHABILITY_HINTS 1
#endif
+
/**
* @}
*/
@@ -2557,7 +2558,7 @@
* compared against this value. If it is smaller, then debugging
* messages are written.
*/
-#if !defined LWIP_DBG_MIN_LEVEL || defined __DOXYGEN__ || defined __DOXYGEN__
+#if !defined LWIP_DBG_MIN_LEVEL || defined __DOXYGEN__
#define LWIP_DBG_MIN_LEVEL LWIP_DBG_LEVEL_ALL
#endif
