bbr: исправить бесконечную рекурсию в bbr_now — bbr_now(bbr) → get_time_tb()

src/etcp_bbr.c

@@ -2,7 +2,7 @@
 #include "../lib/u_async.h"
 #include <stdlib.h>
 
-static uint64_t bbr_now(const struct bbr* bbr) { return bbr->now_tb ? bbr->now_tb : bbr_now(bbr); }
+static uint64_t bbr_now(const struct bbr* bbr) { return bbr->now_tb ? bbr->now_tb : get_time_tb(); }
 
 static void bbr_start_bw_probe_down(struct bbr* bbr);
 static void bbr_start_bw_probe_cruise(struct bbr* bbr);