seas: remove redundant check

(cherry picked from commit ab1b032771be9adbb1d643cd44beac0e09a31553)

src/modules/seas/ha.c

@@ -156,7 +156,7 @@ static inline int parse_ping(
 		}
 		string++;
 	}
-	if(!(ping_period_s && pings_lost_s && ping_timeout_s)) {
+	if(!(pings_lost_s && ping_timeout_s)) {
 		LM_ERR("malformed ping config string. Unparseable :[%s]\n", string);
 		return -1;
 	}