Make use of SAFE_OPEN()

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
diff --git a/testcases/kernel/syscalls/fstat/fstat03.c b/testcases/kernel/syscalls/fstat/fstat03.c
index 1ff61c7..0fa62b8 100644
--- a/testcases/kernel/syscalls/fstat/fstat03.c
+++ b/testcases/kernel/syscalls/fstat/fstat03.c
@@ -137,10 +137,7 @@
 	tst_tmpdir();
 
 	/* Create a testfile under temporary directory */
-	fildes = open(TEST_FILE, O_RDWR | O_CREAT, 0666);
-	if (fildes == -1)
-		tst_brkm(TBROK | TERRNO, cleanup,
-			 "open(%s, O_RDWR|O_CREAT, 0666) failed", TEST_FILE);
+	fildes = SAFE_OPEN(cleanup, TEST_FILE, O_RDWR | O_CREAT, 0666);
 
 	SAFE_CLOSE(cleanup, fildes);
 }