[PATCH] getlogin, getlogin_r tests: Fix incorrect uid type

[FantasqueX]

* tests/test-getlogin.h (test_getlogin_result):
According to source code of glibc, the type of /proc/self/loginuid is
uid_t, which is unsigned int.

Signed-off-by: Letu Ren <fantasquex@gmail.com>
---
 tests/test-getlogin.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/test-getlogin.h b/tests/test-getlogin.h
index 3489e3e03..b5ed8b572 100644
--- a/tests/test-getlogin.h
+++ b/tests/test-getlogin.h
@@ -58,9 +58,9 @@ test_getlogin_result (const char *buf, int err)
       FILE *fp = fopen ("/proc/self/loginuid", "r");
       if (fp != NULL)
         {
-          char buf[3];
+          uid_t uid;
           loginuid_undefined =
-            (fread (buf, 1, 3, fp) == 2 && buf[0] == '-' && buf[1] == '1');
+            (fscanf (fp, "%u", &uid) == 1 && uid == (uid_t) -1);
           fclose (fp);
         }
       if (loginuid_undefined)
-- 
2.36.1