check res for bufferevent_socket_connect (#136)

evhtp.c

@@ -4352,6 +4352,7 @@ evhtp_connection_t *
 evhtp_connection_ssl_new(evbase_t * evbase, const char * addr, uint16_t port, evhtp_ssl_ctx_t * ctx) {
     evhtp_connection_t * conn;
     struct sockaddr_in   sin;
+    int rc;
 
     evhtp_assert(evbase != NULL);
 
@@ -4364,17 +4365,21 @@ evhtp_connection_ssl_new(evbase_t * evbase, const char * addr, uint16_t port, ev
     sin.sin_port        = htons(port);
 
     conn->ssl           = SSL_new(ctx);
+		evhtp_assert(conn->ssl != NULL);
+
     conn->evbase        = evbase;
     conn->bev           = bufferevent_openssl_socket_new(evbase, -1, conn->ssl,
                                                          BUFFEREVENT_SSL_CONNECTING, BEV_OPT_CLOSE_ON_FREE);
+    evhtp_assert(conn->bev != NULL);
 
     bufferevent_enable(conn->bev, EV_READ);
     bufferevent_setcb(conn->bev, NULL, NULL,
                       _evhtp_connection_eventcb, conn);
 
-    bufferevent_socket_connect(conn->bev,
+    rc = bufferevent_socket_connect(conn->bev,
                                (struct sockaddr *)&sin, sizeof(sin));
 
+    evhtp_assert(rc == 0);
 
     return conn;
 }