[tests] Minor fix for Bonding.CloseGroupAndSocket (#2406).

Do not process write[] and read[] on epoll error.

test/test_bonding.cpp

@@ -46,7 +46,7 @@ TEST(Bonding, SRTConnectGroup)
     }, ss);
 
     std::cout << "srt_connect_group calling " << std::endl;
-    const int st = srt_connect_group(ss, targets.data(), targets.size());
+    const int st = srt_connect_group(ss, targets.data(), (int) targets.size());
     std::cout << "srt_connect_group returned " << st << std::endl;
 
     closing_promise.wait();
@@ -264,22 +264,25 @@ TEST(Bonding, CloseGroupAndSocket)
     }
     std::cout << "Returned from connecting two sockets " << std::endl;
 
-    const int default_len = 3;
-    int rlen = default_len;
-    SRTSOCKET read[default_len];
-
-    int wlen = default_len;
-    SRTSOCKET write[default_len];
-
     for (int j = 0; j < 2; ++j)
     {
+        const int default_len = 3;
+        int rlen = default_len;
+        SRTSOCKET read[default_len];
+
+        int wlen = default_len;
+        SRTSOCKET write[default_len];
+
         const int epoll_res = srt_epoll_wait(poll_id, read, &rlen,
             write, &wlen,
             5000, /* timeout */
             0, 0, 0, 0);
 
         std::cout << "Epoll result: " << epoll_res << '\n';
         std::cout << "Epoll rlen: " << rlen << ", wlen: " << wlen << '\n';
+        if (epoll_res < 0)
+            continue;
+
         for (int i = 0; i < rlen; ++i)
         {
             std::cout << "Epoll read[" << i << "]: " << read[i] << '\n';