Don't require that a RuntimeError is raised when playing a second

sound while the first one is still running, as the first one
one might already have finished.

Fixes part of SF bug #763052.

Lib/test/test_winsound.py

@@ -88,11 +88,15 @@ class PlaySoundTest(unittest.TestCase):
             winsound.SND_ALIAS | winsound.SND_ASYNC | winsound.SND_LOOP
         )
         time.sleep(0.5)
-        self.assertRaises(
-            RuntimeError,
-            winsound.PlaySound,
-            'SystemQuestion', winsound.SND_ALIAS | winsound.SND_NOSTOP
-        )
+        try:
+            winsound.PlaySound(
+                'SystemQuestion',
+                winsound.SND_ALIAS | winsound.SND_NOSTOP
+            )
+        except RuntimeError:
+            pass
+        else: # the first sound might already be finished
+            pass
         winsound.PlaySound(None, winsound.SND_PURGE)
 
 def test_main():