zdtm: fix typo in socket-tcp-.*

CID 174774 (#1 of 1): Logically dead code (DEADCODE)
dead_error_line: Execution cannot reach this statement: return 1;.
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

test/zdtm/static/socket-tcp-close-wait.c

@@ -130,7 +130,7 @@ int main(int argc, char **argv)
 			return 1;
 
 		ctl_fd = tcp_init_client(ZDTM_FAMILY, "127.0.0.1", port);
-		if (fd < 0)
+		if (ctl_fd < 0)
 			return 1;
 
 		if (read(ctl_fd, &size, sizeof(size)) != sizeof(size)) {

test/zdtm/static/socket-tcp-closing.c

@@ -125,7 +125,7 @@ int main(int argc, char **argv)
 			return 1;
 
 		ctl_fd = tcp_init_client(ZDTM_FAMILY, "127.0.0.1", port);
-		if (fd < 0)
+		if (ctl_fd < 0)
 			return 1;
 
 		size = fill_sock_buf(fd);

test/zdtm/static/socket-tcp-fin-wait1.c

@@ -128,7 +128,7 @@ int main(int argc, char **argv)
 		write(fd, TEST_MSG, 2);
 
 		ctl_fd = tcp_init_client(ZDTM_FAMILY, "127.0.0.1", port);
-		if (fd < 0)
+		if (ctl_fd < 0)
 			return 1;
 
 		if (read(ctl_fd, &c, 1) != 0) {