[PATCH liburing 1/2] test/timeout: Fix `-Werror=maybe-uninitialized`

[Ammar Faizi <ammar.faizi@xxxxxxxxxxxxxxxxxxxxx>]

Fix this:
```
  timeout.c: In function ‘test_multi_timeout’:
  timeout.c:590:20: warning: ‘user_data’ may be used uninitialized in this function [-Wmaybe-uninitialized]
    590 |                 if (cqe->user_data != user_data) {
        |                    ^
  timeout.c:601:51: warning: ‘time’ may be used uninitialized in this function [-Wmaybe-uninitialized]
    601 |                 if (exp < time / 2 || exp > (time * 3) / 2) {
        |                                             ~~~~~~^~~~
```

Fixes: 37136cb4423b27dac2fc663b6a0c513b6d7d7ad1 ("test/timeout: add multi timeout reqs test with different timeout")
Cc: zhangyi (F) <yi.zhang@xxxxxxxxxx>
Signed-off-by: Ammar Faizi <ammar.faizi@xxxxxxxxxxxxxxxxxxxxx>
---
 test/timeout.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/timeout.c b/test/timeout.c
index f8ba973..8c35b00 100644
--- a/test/timeout.c
+++ b/test/timeout.c
@@ -563,8 +563,8 @@ static int test_multi_timeout(struct io_uring *ring)
 
 	gettimeofday(&tv, NULL);
 	for (i = 0; i < 2; i++) {
-		unsigned int time;
-		__u64 user_data;
+		unsigned int time = 0;
+		__u64 user_data = 0;
 
 		ret = io_uring_wait_cqe(ring, &cqe);
 		if (ret < 0) {
-- 
2.30.2