tcp_stats: fix compilation on CentOS 7
This is to fix the following compile error on CentOS 7:
[ 74s] stats_tcp.c: In function 'fill_stats':
[ 74s] stats_tcp.c:138:15: error: 'struct tcp_info' has no member named 'tcpi_notsent_bytes'
[ 74s] tcp_info.tcpi_notsent_bytes);
[ 74s] ^
Closes: OS#5374
Change-Id: Icde6651baeb0828477dbf540a02b16a1a5f91797
diff --git a/src/stats_tcp.c b/src/stats_tcp.c
index fffb10a..d2be6a9 100644
--- a/src/stats_tcp.c
+++ b/src/stats_tcp.c
@@ -134,8 +134,12 @@
osmo_stat_item_set(osmo_stat_item_group_get_item(stats_tcp_entry->stats_tcp, STATS_TCP_RTT), tcp_info.tcpi_rtt);
osmo_stat_item_set(osmo_stat_item_group_get_item(stats_tcp_entry->stats_tcp, STATS_TCP_RCV_RTT),
tcp_info.tcpi_rcv_rtt);
+#if HAVE_TCP_INFO_TCPI_NOTSENT_BYTES == 1
osmo_stat_item_set(osmo_stat_item_group_get_item(stats_tcp_entry->stats_tcp, STATS_TCP_NOTSENT_BYTES),
tcp_info.tcpi_notsent_bytes);
+#else
+ osmo_stat_item_set(osmo_stat_item_group_get_item(stats_tcp_entry->stats_tcp, STATS_TCP_NOTSENT_BYTES), -1);
+#endif
#if HAVE_TCP_INFO_TCPI_RWND_LIMITED == 1
osmo_stat_item_set(osmo_stat_item_group_get_item(stats_tcp_entry->stats_tcp, STATS_TCP_RWND_LIMITED),