tests/qtest/m48t59-test: Silence compiler warning with -Wshadow

When compiling this file with -Wshadow=local , we get:

../tests/qtest/m48t59-test.c: In function ‘bcd_check_time’:
../tests/qtest/m48t59-test.c:195:17: warning: declaration of ‘s’
 shadows a previous local [-Wshadow=local]
  195 |         long t, s;
      |                 ^
../tests/qtest/m48t59-test.c:158:17: note: shadowed declaration is here
  158 |     QTestState *s = m48t59_qtest_start();
      |                 ^

Rename the QTestState variable to "qts" which is the common
naming for such a variable in other tests.

Reported-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20230922163742.149444-1-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: "Daniel P. Berrangé" <berrange@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/qtest/m48t59-test.c

@@ -155,7 +155,7 @@ static void bcd_check_time(void)
     struct tm *datep;
     time_t ts;
     const int wiggle = 2;
-    QTestState *s = m48t59_qtest_start();
+    QTestState *qts = m48t59_qtest_start();
 
     /*
      * This check assumes a few things.  First, we cannot guarantee that we get
@@ -173,10 +173,10 @@ static void bcd_check_time(void)
     ts = time(NULL);
     gmtime_r(&ts, &start);
 
-    cmos_get_date_time(s, &date[0]);
-    cmos_get_date_time(s, &date[1]);
-    cmos_get_date_time(s, &date[2]);
-    cmos_get_date_time(s, &date[3]);
+    cmos_get_date_time(qts, &date[0]);
+    cmos_get_date_time(qts, &date[1]);
+    cmos_get_date_time(qts, &date[2]);
+    cmos_get_date_time(qts, &date[3]);
 
     ts = time(NULL);
     gmtime_r(&ts, &end);
@@ -207,7 +207,7 @@ static void bcd_check_time(void)
         g_assert_cmpint(ABS(t - s), <=, wiggle);
     }
 
-    qtest_quit(s);
+    qtest_quit(qts);
 }
 
 /* success if no crash or abort */