Fixed coredump

src/edge_utils.c

@@ -1061,13 +1061,14 @@ static ssize_t sendto_fd (n2n_edge_t *eee, const void *buf,
             traceEvent(level, "WSAGetLastError(): %u", WSAGetLastError());
 #endif
         }
-    }
-
+    } else {
         /* we reach here, either because !check_sock_ready() or (errno) */
         supernode_disconnect(eee);
         eee->sn_wait = 1;
         traceEvent(TRACE_DEBUG, "disconnected supernode due to error while sendto_fd");
         return -1;
+    }
+    return sent;
 }