Replace all ASSERT with DEBUGASSERT to save the code space

net/igmp/igmp_msg.c

@@ -113,7 +113,7 @@ void igmp_waitmsg(FAR struct igmp_group_s *group, uint8_t msgid)
            * the wait is awakened by a signal.
            */
 
-          ASSERT(ret == -EINTR || ret == -ECANCELED);
+          DEBUGASSERT(ret == -EINTR || ret == -ECANCELED);
         }
 
       UNUSED(ret);

net/udp/udp_conn.c

@@ -118,7 +118,7 @@ static inline void _udp_semtake(FAR sem_t *sem)
        * the wait was awakened by a signal.
        */
 
-      ASSERT(ret == -EINTR || ret == -ECANCELED);
+      DEBUGASSERT(ret == -EINTR || ret == -ECANCELED);
     }
 
   UNUSED(ret);